| Common Name | Scientific Name | Code |
| n/a | Hydrophyllum virginianum L. var. atranthum (Alexander) Constance | HYVIA |
| n/a | Nama macranthum (Choisy) Brand [excluded] | NAMA6 |
| n/a | Phacelia vossii Atwood [excluded] | PHVO2 |
| Alaska mistmaiden | Romanzoffia unalaschcensis Cham. | ROUN |
| Alaska mistmaiden | Romanzoffia unalaschcensis Cham. var. glabriuscula Hult | ROUNG |
| Alaska mistmaiden | Romanzoffia unalaschcensis Cham. var. unalaschcensis | ROUNU |
| alkali phacelia | Phacelia neglecta M.E. Jones | PHNE |
| alpine phacelia | Phacelia lyallii (Gray) Rydb. | PHLY2 |
| alpine waterleaf | Hydrophyllum capitatum Dougl. ex Benth. var. alpinum S. Wats. | HYCAA |
| Arizona fiestaflower | Pholistoma auritum (Lindl.) Lilja var. arizonicum (M.E. Jones) Constance | PHAUA |
| Arizona phacelia | Phacelia arizonica Gray | PHAR13 |
| Attwood's phacelia | Phacelia argillacea Atwood | PHAR2 |
| Atwood's phacelia | Phacelia pulchella Gray var. atwoodii Welsh | PHPUA |
| Aunt Lucy | Ellisia nyctelea (L.) L. | ELNY |
| Aven Nelson's phacelia | Phacelia anelsonii J.F. Macbr. | PHAN |
| baby blue eyes | Nemophila menziesii Hook. & Arn. | NEME |
| baby blue eyes | Nemophila menziesii Hook. & Arn. var. atomaria (Fisch. & C.A. Mey.) Chandler | NEMEA |
| baby blue eyes | Nemophila menziesii Hook. & Arn. var. integrifolia Parish | NEMEI |
| baby blue eyes | Nemophila menziesii Hook. & Arn. var. menziesii | NEMEM |
| baby blue eyes | Nemophila Nutt. | NEMOP |
| Baker's phacelia | Phacelia bakeri (Brand) J.F. Macbr. | PHBA3 |
| ballhead waterleaf | Hydrophyllum capitatum Dougl. ex Benth. | HYCA4 |
| ballhead waterleaf | Hydrophyllum capitatum Dougl. ex Benth. var. capitatum | HYCAC |
| Barneby's phacelia | Phacelia barnebyana J.T. Howell | PHBA |
| basin nemophila | Nemophila breviflora Gray | NEBR |
| Beatley's phacelia | Phacelia beatleyae Reveal & Constance | PHBE3 |
| beautiful phacelia | Phacelia pulchella Gray | PHPU |
| beautiful phacelia | Phacelia pulchella Gray var. pulchella | PHPUP3 |
| beautiful phacelia | Phacelia pulchella Gray var. sabulonum J.T. Howell | PHPUS |
| betatakin fiddleleaf | Nama retrorsum J.T. Howell | NARE |
| Bitter Creek phacelia | Phacelia salina (A. Nels.) J.T. Howell | PHSA3 |
| blacktack phacelia | Phacelia pachyphylla Gray | PHPA |
| blue fiestaflower | Pholistoma auritum (Lindl.) Lilja | PHAU4 |
| blue fiestaflower | Pholistoma auritum (Lindl.) Lilja var. auritum | PHAUA2 |
| bluntleaf waterleaf | Hydrophyllum canadense L. | HYCA3 |
| Bolander's phacelia | Phacelia bolanderi Gray | PHBO |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. | PHRA2 |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. austrolitoralis Munz | PHRAA |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. eremophila (Greene) J.F. Macbr. | PHRAE |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. latifolia (Torr.) Cronq. | PHRAL |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. montereyensis Munz | PHRAM |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. ramosissima | PHRAR |
| branching phacelia | Phacelia ramosissima Dougl. ex Lehm. var. subglabra M.E. Peck | PHRAS2 |
| Brand's phacelia | Phacelia gilioides Brand | PHGI |
| Brewer's phacelia | Phacelia breweri Gray | PHBR2 |
| bristly nama | Nama hispidum Gray | NAHI |
| broadlobe phacelia | Phacelia platyloba Gray | PHPL |
| Brown's waterleaf | Hydrophyllum brownei Kral & Bates | HYBR11 |
| California fiddleleaf | Nama californicum (Gray) Bacon | NACA3 |
| California hesperochiron | Hesperochiron californicus (Benth.) S. Wats. | HECA7 |
| California mistmaiden | Romanzoffia californica Greene | ROCA6 |
| California phacelia | Phacelia californica Cham. | PHCA |
| California yerba santa | Eriodictyon californicum (Hook. & Arn.) Torr. | ERCA6 |
| calthaleaf phacelia | Phacelia calthifolia Brand | PHCA2 |
| Caracus wigandia | Wigandia urens (Ruiz & Pav?n) Kunth | WIUR |
| Caracus wigandia | Wigandia urens (Ruiz & Pav?n) Kunth var. caracasana (Kunth) D. Gibson | WIURC |
| caterpillar phacelia | Phacelia cicutaria Greene | PHCI |
| caterpillar phacelia | Phacelia cicutaria Greene var. cicutaria | PHCIC |
| caterpillar phacelia | Phacelia cicutaria Greene var. hispida (Gray) J.T. Howell | PHCIH2 |
| caterpillar phacelia | Phacelia cicutaria Greene var. hubbyi (J.F. Macbr.) J.T. Howell | PHCIH3 |
| caterpillars | Phacelia congesta Hook. | PHCO2 |
| changeable phacelia | Phacelia mutabilis Greene | PHMU2 |
| Charleston phacelia | Phacelia hastata Dougl. ex Lehm. var. charlestonensis Cronq. | PHHAC2 |
| Charlotte's phacelia | Phacelia nashiana Jepson | PHNA |
| cleftleaf phacelia | Phacelia crenulata Torr. ex S. Wats. var. angustifolia Atwood | PHCRA |
| cleftleaf wildheiotrope | Phacelia crenulata Torr. ex S. Wats. var. corrugata (A. Nels.) Brand | PHCRC |
| cleftleaf wildheliotrope | Phacelia crenulata Torr. ex S. Wats. | PHCR |
| cleftleaf wildheliotrope | Phacelia crenulata Torr. ex S. Wats. var. crenulata | PHCRC3 |
| cleftleaf wildheliotrope | Phacelia crenulata Torr. ex S. Wats. var. minutiflora (J. Voss) Jepson | PHCRM |
| clustered phacelia | Phacelia capitata Kruckeberg | PHCA15 |
| coast phacelia | Phacelia insularis Munz | PHIN13 |
| coastal phacelia | Phacelia laxa Small | PHLA |
| Colorado Desert phacelia | Phacelia umbrosa Greene | PHUM2 |
| common turricula | Turricula parryi (Gray) J.F. Macbr. | TUPA2 |
| compact phacelia | Phacelia hastata Dougl. ex Lehm. var. compacta (Brand) Cronq. | PHHAC3 |
| Congdon's phacelia | Phacelia congdonii Greene | PHCO18 |
| Constance's phacelia | Phacelia constancei Atwood | PHCO19 |
| Cooke's phacelia | Phacelia cookei Constance & Heckard | PHCO20 |
| Costa Baja phacelia | Phacelia ixodes Kellogg | PHIX2 |
| Coville's phacelia | Phacelia covillei S. Wats. | PHCO30 |
| Coville's purplemat | Nama demissum Gray var. covillei Brand | NADEC |
| Cronquist's phacelia | Phacelia cronquistiana Welsh | PHCR7 |
| dainty desert hideseed | Eucrypta micrantha (Torr.) Heller | EUMI2 |
| Davidson's phacelia | Phacelia davidsonii Gray | PHDA3 |
| Death Valley phacelia | Phacelia vallis-mortae J. Voss | PHVA2 |
| Death Valley phacelia | Phacelia vallis-mortae J. Voss var. vallis-mortae | PHVAV2 |
| Debeque phacelia | Phacelia scopulina (A. Nels.) J.T. Howell | PHSC5 |
| Debeque phacelia | Phacelia scopulina (A. Nels.) J.T. Howell var. scopulina | PHSCS2 |
| Debeque phacelia | Phacelia scopulina (A. Nels.) J.T. Howell var. submutica (J.T. Howell) Halse | PHSCS3 |
| depressed fiddleleaf | Nama depressum J.G. & S.A. Lemmon ex Gray | NADE3 |
| desertbells | Phacelia campanularia Gray | PHCA3 |
| desertbells | Phacelia campanularia Gray ssp. campanularia | PHCAC2 |
| desertbells | Phacelia campanularia Gray ssp. vasiformis Gillett | PHCAV |
| distant phacelia | Phacelia distans Benth. | PHDI |
| divaricate phacelia | Phacelia divaricata (Benth.) Gray | PHDI2 |
| Douglas's phacelia | Phacelia douglasii (Benth.) Torr. | PHDO |
| Douglas's phacelia | Phacelia douglasii (Benth.) Torr. var. douglasii | PHDOD |
| dozing phacelia | Phacelia laxiflora J.T. Howell | PHLA8 |
| drab phacelia | Phacelia indecora J.T. Howell | PHIN11 |
| draperia | Draperia Torr. | DRAPE |
| Dudley's phacelia | Phacelia humilis Torr. & Gray var. dudleyi J.T. Howell | PHHUD |
| dwarf hesperochiron | Hesperochiron pumilus (Dougl. ex Griseb.) Porter | HEPU6 |
| eastern waterleaf | Hydrophyllum virginianum L. | HYVI |
| eastern waterleaf | Hydrophyllum virginianum L. var. virginianum | HYVIV |
| Eastwood's baby blue eyes | Nemophila pulchella Eastw. | NEPU2 |
| Eastwood's baby blue eyes | Nemophila pulchella Eastw. var. gracilis (Eastw.) Constance | NEPUG |
| Eastwood's baby blue eyes | Nemophila pulchella Eastw. var. pulchella | NEPUP2 |
| eggleaf fiddleleaf | Nama pusillum J.G. & S.A. Lemmon ex Gray | NAPU |
| Eisen's phacelia | Phacelia eisenii Brandeg. | PHEI |
| ellisia | Ellisia L. | ELLIS |
| Ellisia nyctelea | Ellisia nyctelea (L.) L. var. coloradensis Brand | ELNYC |
| Ellisia nyctelea | Nyctelea nyctelea (L.) Britt. | NYNY2 |
| Emmenanthe penduliflora var. rosea | Emmenanthe rosea (Brand) Constance | EMRO |
| Eriodictyon angustifolium | Eriodictyon angustifolium Nutt. var. amplifolium Brand | ERANA |
| Eriodictyon crassifolium var. nigrescens | Eriodictyon crassifolium Benth. var. denudatum Abrams | ERCRD |
| Eriodictyon traskiae | Eriodictyon tomentosum Benth. ssp. traskiae (Eastw.) Munz | ERTOT |
| Eriodictyon traskiae | Eriodictyon traskiae Eastw. ssp. smithii Munz | ERTRS |
| Eriodictyon trichocalyx var. lanatum | Eriodictyon lanatum (Brand) Abrams | ERLA11 |
| Eriodictyon trichocalyx var. lanatum | Eriodictyon trichocalyx Heller ssp. lanatum (Brand) Munz | ERTRL |
| false fiddleleaf | Hydrolea L. | HYDRO3 |
| Fendler's waterleaf | Hydrophyllum fendleri (Gray) Heller | HYFE |
| Fendler's waterleaf | Hydrophyllum fendleri (Gray) Heller var. fendleri | HYFEF |
| fernleaf phacelia | Phacelia bipinnatifida Michx. | PHBI2 |
| fiddleleaf | Nama L. | NAMA4 |
| fiestaflower | Pholistoma Lilja | PHOLI2 |
| fivespot | Nemophila maculata Benth. ex Lindl. | NEMA |
| fourpart phacelia | Phacelia tetramera J.T. Howell | PHTE |
| Franklin's phacelia | Phacelia franklinii (R. Br.) Gray | PHFR |
| Fremont's baby blue eyes | Nemophila pulchella Eastw. var. fremontii (Elmer) Constance | NEPUF |
| Fremont's phacelia | Phacelia fremontii Torr. | PHFR2 |
| fringed phacelia | Phacelia fimbriata Michx. | PHFI2 |
| fuzzy phacelia | Phacelia hirsuta Nutt. | PHHI |
| geraniumleaf phacelia | Phacelia geraniifolia Brand | PHGE2 |
| glandular phacelia | Phacelia glandulosa Nutt. | PHGL3 |
| glandular phacelia | Phacelia glandulosa Nutt. var. deserta (A. Nels.) Brand | PHGLD |
| glandular phacelia | Phacelia glandulosa Nutt. var. glandulosa | PHGLG4 |
| glandular yellow phacelia | Phacelia adenophora J.T. Howell | PHAD |
| Goodding's phacelia | Phacelia pulchella Gray var. gooddingii (Brand) J.T. Howell | PHPUG |
| Great Valley phacelia | Phacelia ciliata Benth. | PHCI2 |
| Great Valley phacelia | Phacelia ciliata Benth. var. ciliata | PHCIC2 |
| Great Valley phacelia | Phacelia ciliata Benth. var. opaca J.T. Howell | PHCIO |
| great waterleaf | Hydrophyllum appendiculatum Michx. | HYAP |
| ground nama | Nama aretioides (Hook. & Arn.) Brand | NAAR |
| ground nama | Nama aretioides (Hook. & Arn.) Brand var. aretioides | NAARA |
| ground nama | Nama aretioides (Hook. & Arn.) Brand var. californicum (Brand) Jepson | NAARC2 |
| ground nama | Nama aretioides (Hook. & Arn.) Brand var. multiflorum (Heller) Jepson | NAARM |
| gypsum phacelia | Phacelia integrifolia Torr. | PHIN |
| gypsum phacelia | Phacelia integrifolia Torr. var. integrifolia | PHINI5 |
| hairy yerba santa | Eriodictyon trichocalyx Heller | ERTR7 |
| hairy yerba santa | Eriodictyon trichocalyx Heller var. lanatum (Brand) Jepson | ERTRL2 |
| hairy yerba santa | Eriodictyon trichocalyx Heller var. trichocalyx | ERTRT4 |
| handsome phacelia | Phacelia peirsoniana J.T. Howell | PHPE2 |
| harlequin phacelia | Phacelia howelliana Atwood | PHHO2 |
| Havard's fiddleleaf | Nama havardii Gray | NAHA |
| heated phacelia | Phacelia thermalis Greene | PHTH |
| hesperochiron | Hesperochiron S. Wats. | HESPE4 |
| Hesperochiron californicus | Hesperochiron californicus (Benth.) S. Wats. var. incanus (Greene) Brand | HECAI |
| Hesperochiron californicus | Hesperochiron californicus (Benth.) S. Wats. var. watsonianus (Greene) Brand | HECAW |
| Hesperochiron californicus | Hesperochiron lasianthus (Greene) St. John | HELA14 |
| Hesperochiron pumilus | Hesperochiron villosulus (Greene) Suksdorf | HEVI8 |
| hidden phacelia | Phacelia inconspicua Greene | PHIN10 |
| hiddenflower phacelia | Phacelia cryptantha Greene | PHCR2 |
| hideseed | Eucrypta Nutt. | EUCRY |
| hinahina kahakai | Nama sandwicense Gray | NASA |
| hoary phacelia | Phacelia incana Brand | PHIN9 |
| Hydrolea corymbosa | Nama corymbosa (J. Macbr. ex Ell.) Kuntze | NACO4 |
| Hydrolea ovata | Nama ovata (Nutt. ex Choisy) Britt. | NAOV |
| Hydrolea quadrivalvis | Nama quadrivalvis (Walt.) Kuntze | NAQU |
| Hydrolea uniflora | Hydrolea affinis Gray | HYAF |
| Hydrolea uniflora | Nama affinis (Gray) Kuntze | NAAF |
| Hydrophyllum appendiculatum | Decemium appendiculatum (Michx.) Small | DEAP2 |
| Hydrophyllum fendleri var. albifrons | Hydrophyllum congestum Wieg. | HYCO18 |
| Hydrophyllum occidentale | Hydrophyllum occidentale (S. Wats.) Gray var. watsonii Gray | HYOCW |
| Hydrophyllum tenuipes | Hydrophyllum viridulum G.N. Jones | HYVI8 |
| Idaho phacelia | Phacelia idahoensis Henderson | PHID |
| imbricate phacelia | Phacelia imbricata Greene | PHIM |
| imbricate phacelia | Phacelia imbricata Greene ssp. imbricata | PHIMI |
| imbricate phacelia | Phacelia imbricata Greene ssp. patula (Brand) Heckard | PHIMP |
| Indian Knob mountainbalm | Eriodictyon altissimum P.V. Wells | ERAL12 |
| interior phacelia | Phacelia dubia (L.) Trel. var. interior Fern. | PHDUI |
| Intermountain phacelia | Phacelia demissa Gray | PHDE |
| Intermountain phacelia | Phacelia demissa Gray var. demissa | PHDED |
| Intermountain phacelia | Phacelia demissa Gray var. minor Atwood | PHDEM |
| Inyo phacelia | Phacelia inyoensis (J.F. Macbr.) J.T. Howell | PHIN4 |
| Ives's phacelia | Phacelia ivesiana Torr. | PHIV |
| Ives's phacelia | Phacelia ivesiana Torr. var. ivesiana | PHIVI |
| Ives's phacelia | Phacelia ivesiana Torr. var. pediculoides J.T. Howell | PHIVP |
| Jamaicanweed | Nama jamaicense L. | NAJA |
| Kaweah River phacelia | Phacelia egena (Greene ex Brand) Greene ex J.T. Howell | PHEG |
| Keck's phacelia | Phacelia suaveolens Greene ssp. keckii (Munz & Johnston) Thorne | PHSUK |
| Kirtley's nemophila | Nemophila kirtleyi Henderson | NEKI |
| lacy phacelia | Phacelia tanacetifolia Benth. | PHTA |
| largeflower baby blue eyes | Nemophila phacelioides Nutt. | NEPH |
| largeflower phacelia | Phacelia grandiflora (Benth.) Gray | PHGR |
| largeleaf waterleaf | Hydrophyllum macrophyllum Nutt. | HYMA |
| leafy fiddleleaf | Nama densum J.G. Lemmon var. densum | NADED2 |
| leafy fiddleleaf | Nama densum J.G. Lemmon var. parviflorum (Greenm.) C.L. Hitchc. | NADEP |
| leafy nama | Nama densum J.G. Lemmon | NADE2 |
| Leiberg's phacelia | Phacelia leibergii Brand | PHLE6 |
| Lemmon's phacelia | Phacelia lemmonii Gray | PHLE |
| limestone phacelia | Phacelia affinis Gray | PHAF |
| littlefoot nemophila | Nemophila pedunculata Dougl. ex Benth. | NEPE |
| Lobb's fiddleleaf | Nama lobbii Gray | NALO |
| Lompoc yerba santa | Eriodictyon capitatum Eastw. | ERCA7 |
| longstalk phacelia | Phacelia longipes Torr. ex Gray | PHLO |
| low phacelia | Phacelia humilis Torr. & Gray | PHHU |
| low phacelia | Phacelia humilis Torr. & Gray var. humilis | PHHUH |
| Lundell's phacelia | Phacelia strictiflora (Engelm. & Gray) Gray var. lundelliana Constance | PHSTL |
| Lyon's phacelia | Phacelia lyonii (Gray) Rydb. | PHLY |
| MacKenzie's phacelia | Phacelia lutea (Hook. & Arn.) J.T. Howell var. mackenzieorum J. Grimes & Packard | PHLUM |
| Mangas Spring phacelia | Phacelia bombycina Woot. & Standl. | PHBO4 |
| Mariposa phacelia | Phacelia vallicola Congd. ex Brand | PHVA |
| matted fiddleleaf | Nama torynophyllum Greenm. | NATO |
| Miami mist | Phacelia purshii Buckl. | PHPU3 |
| mistmaiden | Romanzoffia Cham. | ROMAN |
| Mojave phacelia | Phacelia mohavensis Gray | PHMO |
| Mono phacelia | Phacelia monoensis Halse | PHMO11 |
| mountain phacelia | Phacelia orogenes Brand | PHOR |
| Mt. Diablo phacelia | Phacelia phacelioides (Benth.) Brand | PHPH |
| mud fiddleleaf | Nama stenocarpum Gray | NAST |
| nakedstem phacelia | Phacelia gymnoclada Torr. ex S. Wats. | PHGY |
| Nama californicum | Lemmonia californica Gray | LECA |
| Nama carnosum | Nama stenophyllum Gray ex Hemsl. var. egenum J.F. Macbr. | NASTE |
| Nama demissum var. demissum | Nama demissum Gray var. deserti Brand | NADED3 |
| Nama dichotomum | Nama dichotomum (Ruiz & Pav.) Choisy var. dichotomum (Ruiz & Pav.) Choisy [superfluous autonym] | NADID2 |
| Nama hispidum | Nama foliosum (Woot. & Standl.) Tidestrom | NAFO2 |
| Nama hispidum | Nama hispidum Gray var. mentzelii Brand | NAHIM |
| Nama hispidum | Nama hispidum Gray var. revolutum Jepson | NAHIR |
| Nama hispidum | Nama hispidum Gray var. spathulatum (Torr.) C.L. Hitchc. | NAHIS2 |
| Nama hispidum | Nama tenue (Woot. & Standl.) Tidestrom | NATE |
| Nama jamaicense | Marilaunidium jamaicense (L.) Kuntze | MAJA4 |
| Nama sandwicense | Nama sandwicense Gray var. laysanicum Brand | NASAL |
| narrow phacelia | Phacelia filiformis Brand | PHFI |
| narrowleaf yerba santa | Eriodictyon angustifolium Nutt. | ERAN2 |
| narrowsepal phacelia | Phacelia leptosepala Rydb. | PHLE7 |
| Nemophila aphylla | Nemophila microcalyx (Nutt.) Fisch. & C.A. Mey. | NEMI2 |
| Nemophila aphylla | Nemophila triloba (Raf.) Thieret | NETR |
| Nemophila heterophylla | Nemophila heterophylla Fisch. & C.A. Mey. var. tenera (Eastw.) A. Nels. & J.F. Macbr. | NEHET |
| Nemophila menziesii | Nemophila menziesii Hook. & Arn. ssp. insignis (Douglas ex Benth.) Brand | NEMEI5 |
| Nemophila menziesii | Nemophila menziesii Hook. & Arn. var. discoidalis (Lem.) Voss | NEMED |
| Nemophila menziesii var. atomaria | Nemophila menziesii Hook. & Arn. ssp. atomaria (Fisch. & C.A. Mey.) Brand | NEMEA2 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. ssp. australis Brand | NEMEA6 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. ssp. integrifolia (Parish) Munz | NEMEI2 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. var. annulata Chandler | NEMEA3 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. var. incana Brand | NEMEI3 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. var. intermedia (Bioletti) Brand | NEMEI4 |
| Nemophila menziesii var. integrifolia | Nemophila menziesii Hook. & Arn. var. rotata (Eastw.) Chandler | NEMER |
| Nemophila menziesii var. menziesii | Nemophila menziesii Hook. & Arn. var. venosa (Jepson) Brand | NEMEV |
| New Mexico phacelia | Phacelia neomexicana Thurb. ex Torr. | PHNE3 |
| Nine Mile Canyon phacelia | Phacelia novenmillensis Munz | PHNO |
| Nipple Beach phacelia | Phacelia mammillarensis Atwood | PHMA10 |
| North Coast phacelia | Phacelia insularis Munz var. continentis J.T. Howell | PHINC2 |
| northern Channel Islands phacelia | Phacelia insularis Munz var. insularis | PHINI4 |
| Northpark phacelia | Phacelia formosula Osterhout | PHFO2 |
| oceanblue phacelia | Phacelia ranunculacea (Nutt.) Constance | PHRA3 |
| oneflower false fiddleleaf | Hydrolea uniflora Raf. | HYUN |
| Oregon phacelia | Phacelia nemoralis Greene ssp. oregonensis Heckard | PHNEO |
| ovate false fiddleleaf | Hydrolea ovata Nutt. ex Choisy | HYOV |
| Owyhee phacelia | Phacelia lutea (Hook. & Arn.) J.T. Howell var. calva Cronq. | PHLUC |
| Pacific waterleaf | Hydrophyllum tenuipes Heller | HYTE |
| Pacific yerba santa | Eriodictyon traskiae Eastw. | ERTR6 |
| pale phacelia | Phacelia pallida I.M. Johnston | PHPA15 |
| Palmer's phacelia | Phacelia palmeri Torr. ex S. Wats. | PHPA13 |
| Panamint phacelia | Phacelia perityloides Coville | PHPE3 |
| Parish's phacelia | Phacelia parishii Gray | PHPA2 |
| Parry's phacelia | Phacelia parryi Torr. | PHPA3 |
| patch phacelia | Phacelia splendens Eastw. | PHSP3 |
| Peck's phacelia | Phacelia peckii J.T. Howell | PHPE8 |
| pedicellate phacelia | Phacelia pedicellata Gray | PHPE |
| pennyroyal leaf phacelia | Phacelia glechomifolia Gray | PHGL13 |
| persistentflower phacelia | Phacelia marcescens Eastw. ex J.F. Macbr. | PHMA3 |
| phacelia | Phacelia Juss. | PHACE |
| Phacelia adenophora | Miltitzia glandulifera (Torr. ex S. Wats.) Heller | MIGL9 |
| Phacelia adenophora | Phacelia lutea (Hook. & Arn.) J.T. Howell var. glandulifera (Torr. ex S. Wats.) Cronq. | PHLUG |
| Phacelia affinis | Phacelia affinis Gray var. patens J.T. Howell | PHAFP |
| Phacelia alba | Phacelia neomexicana Thurb. ex Torr. var. alba (Rydb.) Brand | PHNEA |
| Phacelia arizonica | Phacelia popei Torr. & Gray var. arizonica (Gray) J. Voss | PHPOA2 |
| Phacelia austromontana | Phacelia humilis Torr. & Gray var. lobata A. Davids. | PHHUL |
| Phacelia austromontana | Phacelia lobata (A. Davids.) Jepson | PHLO8 |
| Phacelia bicolor | Phacelia bicolor S. Watson var. bicolor S. Watson [superfluous autonym] | PHBIB2 |
| Phacelia bipinnatifida | Phacelia bipinnatifida Michx. var. plummeri Wood | PHBIP |
| Phacelia bipinnatifida | Phacelia brevistyla Buckl. | PHBR8 |
| Phacelia bombycina | Phacelia tenuipes Woot. & Standl. | PHTE10 |
| Phacelia caerulea | Phacelia coerulea Greene [orthographic variant] | PHCO |
| Phacelia caerulea | Phacelia intermedia Woot. p.p. | PHIN2 |
| Phacelia cicutaria var. hispida | Phacelia cicutaria Greene ssp. hispida (Gray) Beauchamp ex Thorne | PHCIH4 |
| Phacelia congdonii | Phacelia divaricata (Benth.) Gray var. congdonii (Greene) Munz | PHDIC |
| Phacelia congesta | Phacelia congesta Hook. var. dissecta Gray | PHCOD |
| Phacelia crenulata var. ambigua | Phacelia ambigua M.E. Jones | PHAM8 |
| Phacelia crenulata var. corrugata | Phacelia corrugata A. Nels. | PHCO21 |
| Phacelia crenulata var. crenulata | Phacelia crenulata Torr. ex S. Wats. var. funerea J. Voss ex Munz | PHCRF |
| Phacelia crenulata var. crenulata | Phacelia crenulata Torr. ex S. Wats. var. vulgaris Brand | PHCRV2 |
| Phacelia crenulata var. crenulata | Phacelia intermedia Woot. p.p. | PHIN2 |
| Phacelia crenulata var. minutiflora | Phacelia ambigua M.E. Jones var. minutiflora (J. Voss) Atwood | PHAMM |
| Phacelia crenulata var. minutiflora | Phacelia minutiflora J. Voss | PHMI9 |
| Phacelia cryptantha | Phacelia cryptantha Greene var. derivata J. Voss | PHCRD |
| Phacelia davidsonii | Phacelia curvipes Torr. ex S. Wats. var. macrantha (Parish) Munz | PHCUM |
| Phacelia demissa var. demissa | Phacelia demissa Gray var. heterotricha J.T. Howell | PHDEH |
| Phacelia demissa var. demissa | Phacelia demissa Gray var. typica J.T. Howell | PHDET |
| Phacelia distans | Phacelia cinerea Eastw. ex J.F. Macbr. | PHCI3 |
| Phacelia distans | Phacelia distans Benth. var. australis Brand | PHDIA |
| Phacelia egena | Phacelia magellanica (Lam.) Coville p.p. | PHMA13 |
| Phacelia eisenii | Phacelia eisenii Brandeg. var. brandegeeana J.T. Howell | PHEIB |
| Phacelia exilis | Phacelia mohavensis Gray var. exilis Gray | PHMOE |
| Phacelia geraniifolia | Phacelia perityloides Coville var. jaegeri Munz | PHPEJ |
| Phacelia glandulifera | Phacelia ivesiana Torr. var. glandulifera (Piper) A. Nels. & J.F. Macbr. | PHIVG |
| Phacelia glandulosa var. deserta | Phacelia deserta A. Nels. | PHDE22 |
| Phacelia gymnoclada | Phacelia crassifolia Torr. ex S. Wats. | PHCR5 |
| Phacelia hastata | Phacelia hastata Lehm. ssp. hastata Lehm. [superfluous autonym] | PHHAH2 |
| Phacelia hastata var. compacta | Phacelia frigida Greene | PHFR3 |
| Phacelia hastata var. compacta | Phacelia hastata Dougl. ex Lehm. ssp. compacta (Brand) Heckard | PHHAC |
| Phacelia hastata var. dasyphylla | Phacelia frigida Greene ssp. dasyphylla Heckard | PHFRD |
| Phacelia hastata var. dasyphylla | Phacelia heterophylla Pursh var. dasyphylla Greene ex J.F. Macbr. | PHHED |
| Phacelia hastata var. hastata | Phacelia alpina Rydb. | PHAL11 |
| Phacelia hastata var. hastata | Phacelia hastata Dougl. ex Lehm. var. alpina (Rydb.) Cronq. | PHHAA |
| Phacelia hastata var. hastata | Phacelia hastata Dougl. ex Lehm. var. leucophylla (Torr.) Cronq. | PHHAL |
| Phacelia hastata var. hastata | Phacelia leucophylla Torr. | PHLE16 |
| Phacelia hastata var. hastata | Phacelia leucophylla Torr. var. alpina (Rydb.) Dundas | PHLEA2 |
| Phacelia hastata var. hastata | Phacelia leucophylla Torr. var. suksdorfii J.F. Macbr. | PHLES |
| Phacelia hastata var. hastata | Phacelia oreopola Heckard ssp. simulans Heckard | PHORS |
| Phacelia heterophylla ssp. heterophylla | Phacelia heterophylla Pursh var. typica Dundas | PHHET |
| Phacelia heterophylla ssp. heterophylla | Phacelia sericea (Graham) Gray var. biennis (A. Nels.) Brand | PHSEB |
| Phacelia heterophylla ssp. virgata | Phacelia heterophylla Pursh var. virgata (Greene) Dorn | PHHEV3 |
| Phacelia imbricata ssp. imbricata | Phacelia californica Cham. var. bernardina (Greene) Jepson | PHCAB |
| Phacelia imbricata ssp. imbricata | Phacelia imbricata Greene ssp. bernardina (Greene) Heckard | PHIMB |
| Phacelia imbricata ssp. patula | Phacelia californica Cham. var. patula (Brand) Jepson | PHCAP3 |
| Phacelia imbricata ssp. patula | Phacelia oreopola Heckard | PHOR3 |
| Phacelia incana | Phacelia nevadensis J.T. Howell | PHNE7 |
| Phacelia insularis var. continentis | Phacelia divaricata (Benth.) Gray var. continentis (J.T. Howell) Munz | PHDIC2 |
| Phacelia insularis var. insularis | Phacelia divaricata (Benth.) Gray var. insularis (Munz) Munz | PHDII2 |
| Phacelia integrifolia var. integrifolia | Phacelia integrifolia Torr. var. typica J. Voss | PHINT2 |
| Phacelia integrifolia var. texana | Phacelia texana J. Voss | PHTE12 |
| Phacelia inundata | Miltitzia parviflora (Gray ex Newberry) Brand | MIPA10 |
| Phacelia inyoensis | Miltitzia inyoensis J.F. Macbr. | MIIN8 |
| Phacelia ivesiana var. ivesiana | Phacelia ivesiana Torr. var. typica J.T. Howell | PHIVT |
| Phacelia ivesiana var. pediculoides | Phacelia pediculoides (J.T. Howell) Constance | PHPE9 |
| Phacelia laxiflora | Phacelia perityloides Coville var. laxiflora (J.T. Howell) Cronq. | PHPEL |
| Phacelia leibergii | Phacelia bicolor Torr. ex S. Wats. var. leibergii (Brand) A. Nels. & J.F. Macbr. | PHBIL |
| Phacelia leptosepala | Phacelia hastata Dougl. ex Lehm. var. leptosepala (Rydb.) Cronq. | PHHAL2 |
| Phacelia longipes | Phacelia hardhamiae Munz | PHHA2 |
| Phacelia lutea var. lutea | Miltitzia lutea (Hook. & Arn.) A. DC. | MILU2 |
| Phacelia lutea var. lutea | Phacelia lutea (Hook. & Arn.) J.T. Howell var. purpurascens J.T. Howell | PHLUP |
| Phacelia maculata | Phacelia dubia (L.) Trel. var. fallax (Fern.) Gleason | PHDUF |
| Phacelia malvifolia | Phacelia malvifolia Cham. var. loasifolia (Benth.) Brand | PHMAL |
| Phacelia minor | Phacelia whitlavia Gray | PHWH |
| Phacelia mutabilis | Phacelia californica Cham. var. jacintensis Dundas | PHCAJ |
| Phacelia mutabilis | Phacelia heterophylla Pursh var. griseophylla (Brand) J.F. Macbr. | PHHEG |
| Phacelia mutabilis | Phacelia heterophylla Pursh var. pseudohispida (Brand) Cronq. | PHHEP3 |
| Phacelia neomexicana | Phacelia neomexicana Thurb. ex Torr. var. pseudoarizonica (Brand) J. Voss | PHNEP |
| Phacelia palmeri | Phacelia palmeri Torr. ex S. Wats. var. foetida (Goodding) Brand | PHPAF |
| Phacelia parryi | Phacelia parryi Torr. var. celata Jepson & Hoover ex Jepson | PHPAC2 |
| Phacelia perityloides | Phacelia perityloides Coville var. perityloides Coville [superfluous autonym] | PHPEP3 |
| Phacelia popei | Phacelia depauperata Woot. & Standl. | PHDE13 |
| Phacelia popei | Phacelia popei Torr. & Gray var. similis (Woot. & Standl.) J. Voss | PHPOS2 |
| Phacelia pulchella var. pulchella | Phacelia pulchella Gray var. typica J.T. Howell | PHPUT |
| Phacelia purshii | Phacelia bicknellii Small | PHBI4 |
| Phacelia purshii | Phacelia boykinii (Gray) Small | PHBO8 |
| Phacelia ramosissima var. eremophila | Phacelia eremophila Greene | PHER3 |
| Phacelia ramosissima var. eremophila | Phacelia ramosissima Dougl. ex Lehm. var. valida M.E. Peck | PHRAV |
| Phacelia ramosissima var. latifolia | Phacelia ramosissima Dougl. ex Lehm. var. suffrutescens (Parry) Gray | PHRAS |
| Phacelia ramosissima var. latifolia | Phacelia suffrutescens Parry | PHSU9 |
| Phacelia rupestris | Phacelia congesta Hook. var. rupestris (Greene) J.F. Macbr. | PHCOR |
| Phacelia scopulina var. scopulina | Miltitzia scopulina (A. Nels.) Rydb. | MISC3 |
| Phacelia scopulina var. scopulina | Phacelia lutea (Hook. & Arn.) J.T. Howell var. scopulina (A. Nels.) Cronq. | PHLUS |
| Phacelia scopulina var. submutica | Phacelia lutea (Hook. & Arn.) J.T. Howell var. submutica (J.T. Howell) Cronq. | PHLUS2 |
| Phacelia scopulina var. submutica | Phacelia submutica J.T. Howell | PHSU6 |
| Phacelia sericea ssp. ciliosa | Phacelia ciliosa (Rydb.) Rydb. | PHCI7 |
| Phacelia sericea ssp. ciliosa | Phacelia sericea (Graham) Gray var. ciliosa Rydb. | PHSEC2 |
| Phacelia sericea ssp. sericea | Phacelia sericea (Graham) Gray var. caespitosa Brand | PHSEC3 |
| Phacelia stellaris | Phacelia douglasii (Benth.) Torr var. cryptantha Brand | PHDOC |
| Phacelia stellaris | Phacelia douglasii (Benth.) Torr. ssp. cryptantha (Brand) Beauchamp | PHDOC2 |
| Phacelia suaveolens | Phacelia suaveolens Greene var. suaveolens Greene [superfluous autonym] | PHSUS5 |
| Phacelia suaveolens ssp. keckii | Phacelia keckii Munz & Johnston | PHKE2 |
| Phacelia suaveolens ssp. keckii | Phacelia suaveolens Greene var. keckii (Munz & Johnston) J.T. Howell | PHSUK2 |
| Phacelia tanacetifolia | Phacelia tanacetifolia Benth. subvar. tenuisecta Brand | PHTAT |
| Phacelia tetramera | Miltitzia pusilla (Gray) Brand | MIPU14 |
| Phacelia vallis-mortae var. heliophila | Phacelia cicutaria Greene var. heliophila (J.F. Macbr.) J.T. Howell | PHCIH |
| plateau phacelia | Phacelia rafaelensis Atwood | PHRA9 |
| playa yellow phacelia | Phacelia inundata J.T. Howell | PHIN3 |
| Pope's phacelia | Phacelia popei Torr. & Gray | PHPO |
| prairie phacelia | Phacelia strictiflora (Engelm. & Gray) Gray | PHST |
| prairie phacelia | Phacelia strictiflora (Engelm. & Gray) Gray var. connexa Constance | PHSTC |
| prairie phacelia | Phacelia strictiflora (Engelm. & Gray) Gray var. strictiflora | PHSTS2 |
| Pringle's phacelia | Phacelia pringlei Gray | PHPR |
| purplemat | Nama demissum Gray | NADE |
| purplemat | Nama demissum Gray var. demissum | NADED |
| purplestem phacelia | Phacelia crenulata Torr. ex S. Wats. var. ambigua (M.E. Jones) J.F. Macbr. | PHCRA2 |
| Purpus's phacelia | Phacelia purpusii Brandeg. | PHPU2 |
| Quick's phacelia | Phacelia quickii J.T. Howell | PHQU |
| racemed fiestaflower | Pholistoma racemosum (Nutt. ex Gray) Constance | PHRA5 |
| racemose phacelia | Phacelia racemosa (Kellogg) Brandeg. | PHRA |
| Rattan's phacelia | Phacelia rattanii Gray | PHRA4 |
| Rio Grande phacelia | Phacelia infundibuliformis Torr. | PHIN12 |
| Robbins's phacelia | Phacelia strictiflora (Engelm. & Gray) Gray var. robbinsii Constance | PHSTR |
| rock phacelia | Phacelia rupestris Greene | PHRU2 |
| rockloving phacelia | Phacelia douglasii (Benth.) Torr. var. petrophila Jepson | PHDOP |
| Rocky Mountain phacelia | Phacelia denticulata Osterhout | PHDE2 |
| Romanzoffia californica | Romanzoffia suksdorfii Greene | ROSU7 |
| Rothrock's fiddleleaf | Nama rothrockii Gray | NARO |
| roundleaf phacelia | Phacelia rotundifolia Torr. ex S. Wats. | PHRO2 |
| Saline Valley phacelia | Phacelia amabilis Constance | PHAM |
| sand fiddleleaf | Nama carnosum (Woot.) C.L. Hitchc. | NACA |
| sand phacelia | Phacelia patuliflora (Engelm. & Gray) Gray | PHPA4 |
| sand phacelia | Phacelia patuliflora (Engelm. & Gray) Gray var. austrotexana J.A. Moyer | PHPAA |
| sand phacelia | Phacelia patuliflora (Engelm. & Gray) Gray var. patuliflora | PHPAP2 |
| sand phacelia | Phacelia patuliflora (Engelm. & Gray) Gray var. teucriifolia (I.M. Johnston) Constance | PHPAT |
| sanddune phacelia | Phacelia argentea A. Nels. & J.F. Macbr. | PHAR |
| Santa Lucia phacelia | Phacelia grisea Gray | PHGR3 |
| saw phacelia | Phacelia serrata J. Voss | PHSE5 |
| Scott Mountain phacelia | Phacelia dalesiana J.T. Howell | PHDA |
| Scott Valley phacelia | Phacelia greenei J.T. Howell | PHGR2 |
| serpentine phacelia | Phacelia corymbosa Jepson | PHCO3 |
| shade phacelia | Phacelia nemoralis Greene | PHNE2 |
| shade phacelia | Phacelia nemoralis Greene ssp. nemoralis | PHNEN2 |
| shortlobe phacelia | Phacelia brachyloba (Benth.) Gray | PHBR |
| Sierra baby blue eyes | Nemophila spatulata Coville | NESP |
| silky phacelia | Phacelia sericea (Graham) Gray | PHSE |
| silky phacelia | Phacelia sericea (Graham) Gray ssp. ciliosa (Rydb.) Gillett | PHSEC |
| silky phacelia | Phacelia sericea (Graham) Gray ssp. sericea | PHSES |
| silverleaf phacelia | Phacelia hastata Dougl. ex Lehm. | PHHA |
| silverleaf phacelia | Phacelia hastata Dougl. ex Lehm. var. hastata | PHHAH |
| Siskiyou phacelia | Phacelia leonis J.T. Howell | PHLE2 |
| Sitka mistmaiden | Romanzoffia sitchensis Bong. | ROSI |
| skyblue phacelia | Phacelia caerulea Greene | PHCA43 |
| skyflower | Hydrolea corymbosa J. Macbr. ex Ell. | HYCO7 |
| small baby blue eyes | Nemophila heterophylla Fisch. & C.A. Mey. | NEHE |
| small phacelia | Phacelia minutissima Henderson | PHMI7 |
| small-leaf fiddleleaf | Nama parvifolium (Torr.) Greenm. | NAPA |
| smallflower baby blue eyes | Nemophila aphylla (L.) Brummitt | NEAP |
| smallflower nemophila | Nemophila parviflora Dougl. ex Benth. | NEPA |
| smallflower nemophila | Nemophila parviflora Dougl. ex Benth. var. austiniae (Eastw.) Brand | NEPAA |
| smallflower nemophila | Nemophila parviflora Dougl. ex Benth. var. parviflora | NEPAP |
| smallflower nemophila | Nemophila parviflora Dougl. ex Benth. var. quercifolia (Eastw.) Chandler | NEPAQ |
| smallflower phacelia | Phacelia dubia (L.) Trel. | PHDU |
| smallflower phacelia | Phacelia dubia (L.) Trel. var. dubia | PHDUD |
| smallflower phacelia | Phacelia dubia (L.) Trel. var. georgiana McVaugh | PHDUG |
| smooth phacelia | Phacelia glabra Nutt. | PHGL |
| soft phacelia | Phacelia mollis J.F. Macbr. | PHMO2 |
| southern island phacelia | Phacelia floribunda Greene | PHFL |
| Southern Sierra phacelia | Phacelia austromontana J.T. Howell | PHAU |
| southwestern phacelia | Phacelia glaberrima (Torr. ex S. Wats.) J.T. Howell | PHGL12 |
| spearshaped phacelia | Phacelia hastata Dougl. ex Lehm. var. dasyphylla (Greene ex J.F. Macbr.) Kartesz & Gandhi | PHHAD |
| spiny false fiddleleaf | Hydrolea spinosa L. | HYSP |
| spotted hideseed | Eucrypta chrysanthemifolia (Benth.) Greene | EUCH |
| spotted hideseed | Eucrypta chrysanthemifolia (Benth.) Greene var. bipinnatifida (Torr.) Constance | EUCHB |
| spotted hideseed | Eucrypta chrysanthemifolia (Benth.) Greene var. chrysanthemifolia | EUCHC |
| spotted phacelia | Phacelia maculata Wood | PHMA9 |
| spring phacelia | Phacelia verna T.J. Howell | PHVE3 |
| star phacelia | Phacelia stellaris Brand | PHST7 |
| Stebbins's phacelia | Phacelia stebbinsii Constance & Heckard | PHST6 |
| Stevens's fiddleleaf | Nama stevensii C.L. Hitchc. | NAST2 |
| sticky phacelia | Phacelia glandulifera Piper | PHGL2 |
| sticky phacelia | Phacelia lenta Piper | PHLE12 |
| stinging phacelia | Phacelia malvifolia Cham. | PHMA2 |
| stonecrop phacelia | Phacelia saxicola Gray | PHSA |
| stout phacelia | Phacelia robusta (J.F. Macbr.) I.M. Johnston | PHRO |
| sunloving phacelia | Phacelia vallis-mortae J. Voss var. heliophila (J.F. Macbr.) J. Voss | PHVAH |
| sweetscented phacelia | Phacelia suaveolens Greene | PHSU |
| sweetscented phacelia | Phacelia suaveolens Greene ssp. suaveolens | PHSUS |
| tacky phacelia | Phacelia viscida (Benth. ex Lindl.) Torr. | PHVI |
| tall phacelia | Phacelia procera Gray | PHPR2 |
| Texan phacelia | Phacelia integrifolia Torr. var. texana (J. Voss) Atwood | PHINT |
| thickleaf yerba santa | Eriodictyon crassifolium Benth. | ERCR2 |
| thickleaf yerba santa | Eriodictyon crassifolium Benth. var. crassifolium | ERCRC |
| thickleaf yerba santa | Eriodictyon crassifolium Benth. var. nigrescens Brand | ERCRN |
| Thompson's mistmaiden | Romanzoffia thompsonii V.M. Marttala | ROTH |
| Thompson's waterleaf | Hydrophyllum capitatum Dougl. ex Benth. var. thompsonii (M.E. Peck) Constance | HYCAT |
| threadleaf phacelia | Phacelia linearis (Pursh) Holz. | PHLI |
| threehearts | Tricardia watsonii Torr. ex S. Wats. | TRWA2 |
| Tracy's mistmaiden | Romanzoffia tracyi Jepson | ROTR |
| Transverse Range phacelia | Phacelia exilis (Gray) G.L. Lee | PHEX |
| tricardia | Tricardia Torr. ex S. Wats. | TRICA |
| turricula | Turricula J.F. Macbr. | TURRI |
| twocolor phacelia | Phacelia bicolor Torr. ex S. Wats. | PHBI |
| Utah phacelia | Phacelia utahensis J. Voss | PHUT |
| varileaf phacelia | Phacelia heterophylla Pursh | PHHE2 |
| varileaf phacelia | Phacelia heterophylla Pursh ssp. heterophylla | PHHEH |
| varileaf phacelia | Phacelia heterophylla Pursh ssp. virgata (Greene) Heckard | PHHEV |
| violet draperia | Draperia systyla (Gray) Torr. ex Gray | DRSY |
| virgin phacelia | Phacelia cephalotes Gray | PHCE |
| Washoe phacelia | Phacelia curvipes Torr. ex S. Wats. | PHCU |
| waterleaf | Hydrophyllum L. | HYDRO4 |
| waterleaf phacelia | Phacelia hydrophylloides Torr. ex Gray | PHHY |
| waterpod | Hydrolea quadrivalvis Walt. | HYQU |
| weasel phacelia | Phacelia mustelina Coville | PHMU |
| Welsh's phacelia | Phacelia welshii Atwood | PHWE |
| western waterleaf | Hydrophyllum occidentale (S. Wats.) Gray | HYOC |
| whisperingbells | Emmenanthe Benth. | EMMEN |
| whisperingbells | Emmenanthe penduliflora Benth. | EMPE |
| whisperingbells | Emmenanthe penduliflora Benth. var. penduliflora | EMPEP |
| whisperingbells | Emmenanthe penduliflora Benth. var. rosea Brand | EMPER |
| white fiestaflower | Pholistoma membranaceum (Benth.) Constance | PHME3 |
| white phacelia | Phacelia alba Rydb. | PHAL9 |
| white waterleaf | Hydrophyllum fendleri (Gray) Heller var. albifrons (Heller) J.F. Macbr. | HYFEA |
| whitewhisker fiddleleaf | Nama undulatum Kunth | NAUN |
| wigandia | Wigandia Kunth | WIGAN |
| Wigandia urens var. caracasana | Wigandia caracasana Kunth | WICA6 |
| Wigandia urens var. caracasana | Wigandia caracasana Kunth var. macrophylla Brand | WICAM |
| wild canterbury bells | Phacelia minor (Harvey) Thellung | PHMI |
| wishbone fiddleleaf | Nama dichotomum (Ruiz & Pav?n) Choisy | NADI |
| woolly yerba santa | Eriodictyon tomentosum Benth. | ERTO |
| yellow phacelia | Phacelia lutea (Hook. & Arn.) J.T. Howell | PHLU |
| yellow phacelia | Phacelia lutea (Hook. & Arn.) J.T. Howell var. lutea | PHLUL2 |
| yellowseed fiddleleaf | Nama xylopodum (Woot. & Standl.) C.L. Hitchc. | NAXY |
| yerba santa | Eriodictyon Benth. | ERIOD |