| Common Name | Scientific Name | Code |
| n/a | Orobanche dugesii (S. Wats.) Munz [excluded] | ORDU2 |
| n/a | Orobanche multicaulis Brandeg. var. palmeri Munz [excluded] | ORMUP4 |
| aeginetia | Aeginetia L. | AEGIN |
| alpine cancer-root | Conopholis alpina Liebm. | COAL6 |
| American cancer-root | Conopholis americana (L.) Wallr. | COAM |
| bean broomrape | Orobanche crenata Forsk. [excluded] | ORCR |
| beechdrops | Epifagus Nutt. | EPIFA |
| beechdrops | Epifagus virginiana (L.) W. Bart. | EPVI2 |
| broomrape | Orobanche L. | OROBA |
| California broomrape | Orobanche californica Cham. & Schlecht. | ORCA2 |
| California broomrape | Orobanche californica Cham. & Schlecht. ssp. californica | ORCAC2 |
| California broomrape | Orobanche californica Cham. & Schlecht. ssp. condensa Heckard | ORCAC |
| California broomrape | Orobanche californica Cham. & Schlecht. ssp. feudgei (Munz) Heckard | ORCAF |
| California broomrape | Orobanche californica Cham. & Schlecht. ssp. grandis Heckard | ORCAG |
| California groundcone | Boschniakia strobilacea Gray | BOST2 |
| cancer-root | Conopholis Wallr. | CONOP |
| chaparral broomrape | Orobanche bulbosa (Gray) G. Beck | ORBU |
| clustered broomrape | Orobanche fasciculata Nutt. | ORFA |
| conifer broomrape | Orobanche pinorum Geyer ex Hook. | ORPI2 |
| Conopholis alpina var. mexicana | Conopholis mexicana Gray ex S. Wats. | COME7 |
| Conopholis alpina var. mexicana | Orobanche multiflora Nutt. var. xanthochroa (A. Nels. & Cockerell) Munz | ORMUX |
| Conopholis alpina var. mexicana | Orobanche xanthochroa A. Nels. & Cockerell | ORXA |
| Conopholis americana | Orobanche americana L. | ORAM |
| desert broomrape | Orobanche cooperi (Gray) Heller | ORCO4 |
| desert broomrape | Orobanche cooperi (Gray) Heller ssp. cooperi | ORCOC2 |
| desert broomrape | Orobanche cooperi (Gray) Heller ssp. latiloba (Munz) Collins, comb. nov. ined. | ORCOL |
| Epifagus virginiana | Leptamnium virginianum (L.) Raf. | LEVI14 |
| flat-top broomrape | Orobanche corymbosa (Rydb.) Ferris | ORCO5 |
| flat-top broomrape | Orobanche corymbosa (Rydb.) Ferris ssp. corymbosa | ORCOC3 |
| flat-top broomrape | Orobanche corymbosa (Rydb.) Ferris ssp. mutabilis Heckard | ORCOM |
| Gray's broomrape | Orobanche californica Cham. & Schlecht. ssp. grayana (G. Beck) Heckard | ORCAG2 |
| groundcone | Boschniakia C.A. Mey. ex Bong. | BOSCH |
| hellroot | Orobanche minor Sm. | ORMI |
| hemp broomrape | Orobanche ramosa L. | ORRA |
| hillside broomrape | Orobanche vallicola (Jepson) Heckard | ORVA2 |
| Howell's broomrape | Orobanche valida Jepson ssp. howellii Heckard & Collins | ORVAH |
| ivy broomrape | Orobanche hederae Duby | ORHE3 |
| Jepson's broomrape | Orobanche californica Cham. & Schlecht. ssp. jepsonii (Munz) Heckard | ORCAJ |
| Louisiana broomrape | Orobanche ludoviciana Nutt. | ORLU |
| Louisiana broomrape | Orobanche ludoviciana Nutt. ssp. ludoviciana | ORLUL2 |
| manyflower broomrape | Orobanche ludoviciana Nutt. ssp. multiflora (Nutt.) Collins, comb. nov. ined. | ORLUM |
| Mexican cancer-root | Conopholis alpina Liebm. var. mexicana (Gray ex S. Wats.) Haynes | COALM |
| nodding broomrape | Orobanche cernua Loefl. [excluded] | ORCE |
| northern groundcone | Boschniakia rossica (Cham. & Schlecht.) Fedtsch. | BORO |
| oneflowered broomrape | Orobanche uniflora L. | ORUN |
| Orobanche bulbosa | Aphyllon tuberosum (Gray) Gray | APTU |
| Orobanche bulbosa | Myzorrhiza tuberosa (Gray) Rydb. | MYTU |
| Orobanche bulbosa | Phelipaea tuberosa Gray | PHTU5 |
| Orobanche californica ssp. californica | Myzorrhiza californica (Cham. & Schlecht.) Rydb. | MYCA5 |
| Orobanche californica ssp. californica | Orobanche grayana G. Beck var. nelsonii Munz | ORGRN |
| Orobanche californica ssp. californica | Orobanche grayana G. Beck var. violacea (Eastw.) Munz | ORGRV |
| Orobanche californica ssp. feudgei | Orobanche grayana G. Beck var. feudgei Munz | ORGRF |
| Orobanche californica ssp. grayana | Orobanche californica Cham. & Schlecht. var. grayana (G. Beck) Cronq. | ORCAG3 |
| Orobanche californica ssp. grayana | Orobanche grayana G. Beck | ORGR4 |
| Orobanche californica ssp. jepsonii | Orobanche grayana G. Beck var. jepsonii Munz | ORGRJ |
| Orobanche cooperi ssp. cooperi | Aphyllon cooperi Gray | APCO2 |
| Orobanche cooperi ssp. cooperi | Myzorrhiza cooperi (Gray) Rydb. | MYCO4 |
| Orobanche cooperi ssp. cooperi | Orobanche ludoviciana Nutt. var. cooperi (Gray) G. Beck | ORLUC |
| Orobanche cooperi ssp. latiloba | Orobanche ludoviciana Nutt. var. latiloba Munz | ORLUL |
| Orobanche corymbosa ssp. corymbosa | Myzorrhiza corymbosa Rydb. | MYCO5 |
| Orobanche corymbosa ssp. corymbosa | Orobanche californica Cham. & Schlecht. var. corymbosa (Rydb.) Munz | ORCAC4 |
| Orobanche dugesii | Aphyllon dugesii S. Wats. [excluded] | APDU3 |
| Orobanche fasciculata | Anoplanthus fasciculatus (Nutt.) Walp. | ANFA2 |
| Orobanche fasciculata | Aphyllon fasciculatum (Nutt.) Torr. & Gray | APFA |
| Orobanche fasciculata | Orobanche fasciculata Nutt. var. franciscana Achey | ORFAF |
| Orobanche fasciculata | Orobanche fasciculata Nutt. var. lutea (Parry) Achey | ORFAL |
| Orobanche fasciculata | Orobanche fasciculata Nutt. var. subulata Goodman | ORFAS |
| Orobanche fasciculata | Orobanche fasciculata Nutt. var. typica Achey | ORFAT |
| Orobanche fasciculata | Thalesia fasciculata (Nutt.) Britt. | THFA |
| Orobanche fasciculata | Thalesia lutea (Parry) Rydb. | THLU |
| Orobanche ludoviciana ssp. ludoviciana | Aphyllon arenosum Suksdorf | APAR3 |
| Orobanche ludoviciana ssp. ludoviciana | Conopholis ludoviciana (Nutt.) Wood | COLU3 |
| Orobanche ludoviciana ssp. ludoviciana | Myzorrhiza ludoviciana (Nutt.) Rydb. | MYLU |
| Orobanche ludoviciana ssp. ludoviciana | Orobanche ludoviciana Nutt. var. arenosa (Suksdorf) Cronq. | ORLUA |
| Orobanche ludoviciana ssp. ludoviciana | Orobanche ludoviciana Nutt. var. genuina G. Beck | ORLUG |
| Orobanche ludoviciana ssp. ludoviciana | Orobanche multiflora Nutt. var. arenosa (Suksdorf) Munz | ORMUA |
| Orobanche ludoviciana ssp. multiflora | Myzorrhiza multiflora (Nutt.) Rydb. | MYMU2 |
| Orobanche ludoviciana ssp. multiflora | Orobanche ludoviciana Nutt. var. multiflora (Nutt.) G. Beck | ORLUM2 |
| Orobanche ludoviciana ssp. multiflora | Orobanche multiflora Nutt. | ORMU |
| Orobanche ludoviciana ssp. multiflora | Orobanche multiflora Nutt. var. pringlei Munz | ORMUP2 |
| Orobanche ludoviciana ssp. multiflora | Orobanche multiflora Nutt. var. typica Munz | ORMUT |
| Orobanche ludoviciana ssp. multiflora | Phelipaea erianthera Engelm. | PHER4 |
| Orobanche multicaulis | Orobanche multicaulis Brandeg. var. genuina Munz | ORMUG |
| Orobanche parishii ssp. parishii | Orobanche californica Cham. & Schlecht. var. parishii Jepson | ORCAP |
| Orobanche pinorum | Aphyllon pinorum (Geyer ex Hook.) Gray | APPI2 |
| Orobanche pinorum | Myzorrhiza pinorum (Geyer ex Hook.) Rydb. | MYPI2 |
| Orobanche pinorum | Phelipaea pinorum (Geyer ex Hook.) Gray | PHPI3 |
| Orobanche uniflora | Aphyllon uniflorum (L.) Torr. & Gray | APUN2 |
| Orobanche uniflora | Orobanche porphyrantha G. Beck | ORPO |
| Orobanche uniflora | Orobanche purpurea Jacq. | ORPU7 |
| Orobanche uniflora | Orobanche sedii (Suksdorf) Fech. | ORSE4 |
| Orobanche uniflora | Orobanche terrae-novae Fern. | ORTE3 |
| Orobanche uniflora | Orobanche uniflora L. ssp. occidentalis (Greene) Abrams ex Ferris | ORUNO |
| Orobanche uniflora | Orobanche uniflora L. var. minuta (Suksdorf) G. Beck | ORUNM2 |
| Orobanche uniflora | Orobanche uniflora L. var. occidentalis (Greene) Taylor & MacBryde | ORUNO2 |
| Orobanche uniflora | Orobanche uniflora L. var. purpurea (Heller) Achey | ORUNP |
| Orobanche uniflora | Orobanche uniflora L. var. sedii (Suksdorf) Achey | ORUNS |
| Orobanche uniflora | Orobanche uniflora L. var. terrae-novae (Fern.) Munz | ORUNT |
| Orobanche uniflora | Orobanche uniflora L. var. typica Achey | ORUNT2 |
| Orobanche uniflora | Thalesia uniflora (L.) Britt. | THUN3 |
| Orobanche valida ssp. valida | Orobanche ludoviciana Nutt. var. valida (Jepson) Munz | ORLUV |
| Orobanche vallicola | Orobanche californica Cham. & Schlecht. var. claremontensis Munz | ORCAC5 |
| Parish's broomrape | Orobanche parishii (Jepson) Heckard | ORPA2 |
| Parish's broomrape | Orobanche parishii (Jepson) Heckard ssp. brachyloba Heckard | ORPAB |
| Parish's broomrape | Orobanche parishii (Jepson) Heckard ssp. parishii | ORPAP |
| Rock Creek broomrape | Orobanche valida Jepson | ORVA |
| Rock Creek broomrape | Orobanche valida Jepson ssp. valida | ORVAV |
| spiked broomrape | Orobanche multicaulis Brandeg. | ORMU3 |
| Vancouver groundcone | Boschniakia hookeri Walp. | BOHO |
| ye gu | Aeginetia indica L. | AEIN6 |