| Common Name | Scientific Name | Code |
| n/a | Boehmeria celebica Blume | BOCE3 |
| n/a | Boehmeria densiflora Hook. & Arn. | BODE9 |
| n/a | Dendrocnide latifolia (Gaudich.) Chew | DELA13 |
| n/a | Dendrocnide Miq. | DENDR16 |
| n/a | Elatostema calcareum Merr. | ELCA27 |
| n/a | Elatostema grandifolium Reinecke | ELGR5 |
| n/a | Elatostema J.R. & G. Forst. | ELATO |
| n/a | Laportea cuneata (A. Rich.) Chew [excluded] | LACU3 |
| n/a | Laportea ruderalis (G.Forst.) Chew | LARU4 |
| n/a | Maoutia australis Wedd. | MAAU7 |
| n/a | Maoutia Wedd. | MAOUT |
| n/a | Phenax Weddell | PHENA |
| n/a | Pilea grandifolia (L.) Blume [excluded] | PIGR9 |
| n/a | Pipturus argenteus (G.Forst.) Wedd. | PIAR8 |
| n/a | Procris Juss. | PROCR |
| n/a | Procris pedunculata (J.R.Forst.) Wedd. | PRPE6 |
| angularfruit ma'oloa | Neraudia angulata Cowan | NEAN |
| angularfruit ma'oloa | Neraudia angulata Cowan var. angulata | NEANA |
| angularfruit ma'oloa | Neraudia angulata Cowan var. dentata O. Deg. & Cowan | NEAND |
| Antilles clearweed | Pilea rivoriae Weddell | PIRI4 |
| artillery plant | Pilea trianthemoides (Sw.) Lindl. | PITR4 |
| Asian ghostweed | Phenax sonneratii (Poir.) Weddell | PHSO4 |
| Big Island ma'oloa | Neraudia ovata Gaud. | NEOV |
| Boehmeria cylindrica | Boehmeria austrina Small | BOAU |
| Boehmeria cylindrica | Boehmeria cylindrica (L.) Sw. var. drummondiana (Weddell) Weddell | BOCYD |
| Boehmeria cylindrica | Boehmeria cylindrica (L.) Sw. var. scabra Porter | BOCYS |
| Boehmeria cylindrica | Boehmeria decurrens Small | BODE5 |
| Boehmeria cylindrica | Boehmeria drummondiana Weddell | BODR2 |
| Boehmeria cylindrica | Boehmeria scabra (Porter) Small | BOSC2 |
| Boehmeria cylindrica | Urtica cylindrica L. | URCY |
| Boehmeria grandis | Boehmeria grandis (Hook. & Arn.) Heller var. cuneata Skottsberg | BOGRC |
| Boehmeria grandis | Boehmeria grandis (Hook. & Arn.) Heller var. kauaiensis Skottsberg | BOGRK |
| Boehmeria grandis | Boehmeria stipularis Weddell | BOST3 |
| Boehmeria grandis | Urtica grandis Hook. & Arn. | URGR2 |
| Boehmeria nivea | Ramium niveum (L.) Small | RANI4 |
| Boehmeria nivea | Urtica nivea L. | URNI |
| California nettle | Urtica dioica L. ssp. gracilis (Ait.) Seland. | URDIG |
| California pellitory | Parietaria hespera Hinton var. californica Hinton | PAHEC |
| Canadian clearweed | Pilea pumila (L.) Gray | PIPU2 |
| Canadian clearweed | Pilea pumila (L.) Gray var. pumila | PIPUP |
| Canadian woodnettle | Laportea canadensis (L.) Weddell | LACA3 |
| Caribbean clearweed | Pilea herniarioides (Sw.) Lindl. | PIHE |
| Chinese grass | Boehmeria nivea (L.) Gaud. | BONI2 |
| clearweed | Pilea Lindl. | PILEA |
| cliffside clearweed | Pilea semidentata (Juss. ex Poir.) Weddell | PISE2 |
| clustered pellitory | Parietaria praetermissa Hinton | PAPR6 |
| Coamo River pouzolzsbush | Pouzolzia occidentalis (Liebm.) Weddell | POOC4 |
| creeping charlie | Pilea nummulariifolia (Sw.) Weddell | PINU |
| Cypholophus moluccanus | Cypholophus macrocephalus Weddell | CYMA21 |
| Deam's clearweed | Pilea pumila (L.) Gray var. deamii (Lunell) Fern. | PIPUD |
| depressed clearweed | Pilea depressa (Sw.) Blume | PIDE2 |
| dwarf nettle | Urtica urens L. | URUR |
| false nettle | Boehmeria Jacq. | BOEHM |
| flameberry | Urera caracasana (Jacq.) Gaud. ex Griseb. | URCA2 |
| Florida pellitory | Parietaria floridana Nutt. | PAFL3 |
| Forbes's pipturus | Pipturus forbesii Krajina | PIFO2 |
| friendship plant | Pilea involucrata (Sims) Urban | PIIN6 |
| graceful pouzolzsbush | Pouzolzia zeylanica (L.) Benn. | POZE |
| Hawai'i false nettle | Boehmeria grandis (Hook. & Arn.) Heller | BOGR3 |
| Hawai'I lopleaf | Cypholophus moluccanus (Blume) Miq. | CYMO12 |
| Hawai'i stingingnettle | Hesperocnide sandwicensis (Weddell) Weddell | HESA5 |
| Hawai'i woodnettle | Laportea interrupta (L.) Chew | LAIN4 |
| heartleaf nettle | Urtica chamaedryoides Pursh | URCH3 |
| hopue | Urera glabra (Hook. & Arn.) Weddell | URGL |
| horehound-leaf nettle | Urtica ballotifolia Weddell | URBA3 |
| Kauai ma'oloa | Neraudia kauaiensis (Hbd.) Cowan | NEKA2 |
| Kauai pipturus | Pipturus kauaiensis Heller | PIKA |
| Krug's clearweed | Pilea krugii Urban | PIKR |
| laportea | Laportea Gaud. | LAPOR |
| Laportea aestuans | Fleurya aestuans (L.) Gaud. | FLAE |
| Laportea aestuans | Urtica aestuans L. | URAE |
| Laportea canadensis | Urtica canadensis L. | URCA6 |
| Laportea canadensis | Urticastrum divaricatum (L.) Kuntze | URDI3 |
| Laportea interrupta | Urtica interrupta L. | URIN |
| lesser clearweed | Pilea fontana (Lunell) Rydb. | PIFO |
| Liquillo Mountain clearweed | Pilea multicaulis Urban | PIMU3 |
| lopleaf | Cypholophus Weddell | CYPHO2 |
| ma'aloa | Neraudia melastomifolia Gaud. | NEME5 |
| ma'oloa | Neraudia Gaud. | NERAU |
| Margarett's clearweed | Pilea margarettiae Britt. | PIMA5 |
| mother of thousands | Soleirolia soleirolii (Req.) Dandy | SOSO |
| mountain clearweed | Pilea yunquensis (Urban) Britt. & P. Wilson | PIYU2 |
| mountain nettle | Urtica gracilenta Greene | URGR |
| musgo | Pilea tenerrima Miq. | PITE4 |
| Neraudia kauaiensis | Neraudia kauaiensis (Hbd.) Cowan var. helleri Cowan | NEKAH |
| Neraudia melastomifolia | Neraudia melastomifolia Gaud. var. gaudichaudii Cowan | NEMEG |
| Neraudia melastomifolia | Neraudia melastomifolia Gaud. var. pallida Cowan | NEMEP |
| Neraudia melastomifolia | Neraudia melastomifolia Gaud. var. parvifolia (Wawra) Hbd. | NEMEP2 |
| Neraudia melastomifolia | Neraudia melastomifolia Gaud. var. pubescens Cowan | NEMEP3 |
| Neraudia melastomifolia | Neraudia melastomifolia Gaud. var. uncinata Cowan | NEMEU |
| Neraudia ovata | Neraudia cookii St. John | NECO4 |
| Neraudia sericea | Neraudia kahoolawensis Hbd. | NEKA |
| nettle | Urtica L. | URTIC |
| olona | Touchardia latifolia Gaud. | TOLA |
| opuhe | Urera kaalae Wawra | URKA |
| ortiga | Urera chlorocarpa Urban | URCH2 |
| Pacific Island clearweed | Pilea peploides (Gaud.) Hook. & Arn. | PIPE5 |
| Parietaria floridana | Parietaria debilis auct. non Forst. f. [misapplied] | PADE21 |
| Parietaria floridana | Parietaria nummularia Small | PANU6 |
| Parietaria judaica | Parietaria diffusa Mert. & Koch | PADI12 |
| Parietaria pensylvanica | Parietaria obtusa Rydb. ex Small | PAOB3 |
| Parietaria pensylvanica | Parietaria occidentalis Rydb. | PAOC4 |
| Parietaria pensylvanica | Parietaria pensylvanica Muhl. ex Willd. var. obtusa (Rydb. ex Small) Shinners | PAPEO |
| pellitory | Parietaria L. | PARIE |
| Pennsylvania pellitory | Parietaria pensylvanica Muhl. ex Willd. | PAPE5 |
| Pilea fontana | Adicea fontana Lunell | ADFO |
| Pilea fontana | Pilea opaca (Lunell) Rydb. | PIOP2 |
| Pilea herniarioides | Urtica herniarioides Sw. | URHE2 |
| Pilea inaequalis | Pilea obtusata Liebm. | PIOB |
| Pilea inaequalis | Pilea repens (Sw.) Weddell | PIRE4 |
| Pilea microphylla | Parietaria microphylla L. | PAMI11 |
| Pilea nummulariifolia | Urtica nummulariifolia Sw. | URNU2 |
| Pilea parietaria | Urtica parietaria L. | URPA2 |
| Pilea peploides | Dubreulia peploides Gaud. | DUPE |
| Pilea peploides | Pilea peploides (Gaud.) Hook. & Arn. var. major Hbd. | PIPEM |
| Pilea pumila var. pumila | Adicea pumila (L.) Raf. | ADPU2 |
| Pilea pumila var. pumila | Urtica pumila L. | URPU2 |
| Pilea trianthemoides | Pilea microphylla (L.) Liebm. var. trianthemoides (Sw.) Griseb. | PIMIT |
| Pilea trianthemoides | Pilea serpyllifolia (Poir.) Weddell | PISE3 |
| Pilea trianthemoides | Urtica trianthemoides Sw. | URTR3 |
| pipturus | Pipturus Weddell | PIPTU |
| Pipturus albidus | Pipturus brighamii Skottsberg | PIBR2 |
| Pipturus albidus | Pipturus gaudichaudianus Weddell | PIGA |
| Pipturus albidus | Pipturus gaudichaudianus Weddell var. asperrimus Skottsberg | PIGAA |
| Pipturus albidus | Pipturus gaudichaudianus Weddell var. hualalaiensis Skottsberg | PIGAH |
| Pipturus albidus | Pipturus hawaiensis Levl. | PIHA2 |
| Pipturus albidus | Pipturus hawaiensis Levl. var. eriocarpus (Skottsberg) Skottsberg | PIHAE |
| Pipturus albidus | Pipturus hawaiensis Levl. var. integrifolius O.& I. Deg. | PIHAI |
| Pipturus albidus | Pipturus hawaiensis Levl. var. molokaiensis (Skottsberg) O.& I. Deg. | PIHAM |
| Pipturus albidus | Pipturus helleri Skottsberg | PIHE2 |
| Pipturus albidus | Pipturus oahuensis Skottsberg | PIOA |
| Pipturus albidus | Pipturus pachyphyllus Skottsberg | PIPA8 |
| Pipturus albidus | Pipturus pterocarpus Skottsberg | PIPT |
| Pipturus albidus | Pipturus rockii Skottsberg | PIRO4 |
| Pipturus albidus | Pipturus skottsbergii Krajina | PISK |
| pouzolzia | Pouzolzia Gaud. | POUZO |
| Pouzolzia occidentalis | Leucococcus occidentalis Liebm. | LEOC3 |
| Pouzolzia zeylanica | Parietaria zeylanica L. | PAZE |
| Puerto Rico clearweed | Pilea leptophylla Urban | PILE2 |
| red pipturus | Pipturus ruber Heller | PIRU2 |
| Richard's clearweed | Pilea richardii Urban | PIRI3 |
| rillita pellitory | Parietaria hespera Hinton | PAHE5 |
| rillita pellitory | Parietaria hespera Hinton var. hespera | PAHEH |
| rockweed | Pilea microphylla (L.) Liebm. | PIMI2 |
| rousselia | Rousselia Gaud. | ROUSS |
| scratchbush | Urera baccifera (L.) Gaud. | URBA |
| shineseed | Rousselia humilis (Sw.) Urban | ROHU |
| smallspike false nettle | Boehmeria cylindrica (L.) Sw. | BOCY |
| soleirolia | Soleirolia Gaud. | SOLEI |
| Soleirolia soleirolii | Helxine soleirolii Req. | HESO3 |
| spreading pellitory | Parietaria judaica L. | PAJU |
| stinging nettle | Urtica dioica L. | URDI |
| stinging nettle | Urtica dioica L. ssp. dioica | URDID |
| stinging nettle | Urtica dioica L. ssp. holosericea (Nutt.) Thorne | URDIH |
| stingingnettle | Hesperocnide Torr. | HESPE6 |
| touchardia | Touchardia Gaud. | TOUCH |
| Touchardia latifolia | Touchardia angusta St. John | TOAN3 |
| upright pellitory | Parietaria officinalis L. | PAOF |
| urera | Urera Gaud. | URERA |
| urera | Urera obovata Benth. | UROB |
| Urera baccifera | Urtica baccifera L. | URBA2 |
| Urera caracasana | Urtica caracasana Jacq. | URCA4 |
| Urera glabra | Urera konaensis St. John | URKO |
| Urera glabra | Urera sandvicensis Weddell | URSA |
| Urera glabra | Urera sandvicensis Weddell var. kauaiensis Rock | URSAK |
| Urera glabra | Urera sandvicensis Weddell var. mollis Weddell | URSAM |
| Urtica chamaedryoides | Urtica chamaedryoides Pursh var. runyonii Correll | URCHR |
| Urtica dioica ssp. dioica | Urtica gracilis Ait. var. latifolia Farw. | URGRL |
| Urtica dioica ssp. gracilis | Urtica californica Greene | URCA3 |
| Urtica dioica ssp. gracilis | Urtica cardiophylla Rydb. | URCA5 |
| Urtica dioica ssp. gracilis | Urtica dioica L. var. angustifolia Schlecht. | URDIA |
| Urtica dioica ssp. gracilis | Urtica dioica L. var. californica (Greene) C.L. Hitchc. | URDIC |
| Urtica dioica ssp. gracilis | Urtica dioica L. var. gracilis (Ait.) C.L. Hitchc. | URDIG2 |
| Urtica dioica ssp. gracilis | Urtica dioica L. var. lyallii (S. Wats.) C.L. Hitchc. | URDIL |
| Urtica dioica ssp. gracilis | Urtica dioica L. var. procera (Muhl. ex Willd.) Weddell | URDIP2 |
| Urtica dioica ssp. gracilis | Urtica gracilis Ait. | URGR3 |
| Urtica dioica ssp. gracilis | Urtica lyallii S. Wats. | URLY2 |
| Urtica dioica ssp. gracilis | Urtica lyallii S. Wats. var. californica (Greene) Jepson | URLYC |
| Urtica dioica ssp. gracilis | Urtica major H.P. Fuchs | URMA |
| Urtica dioica ssp. gracilis | Urtica procera Muhl. ex Willd. | URPR |
| Urtica dioica ssp. gracilis | Urtica serra auct. non Blume [misapplied] | URSE3 |
| Urtica dioica ssp. gracilis | Urtica strigosissima Rydb. | URST2 |
| Urtica dioica ssp. gracilis | Urtica viridis Rydb. | URVI |
| Urtica dioica ssp. holosericea | Urtica breweri S. Wats. | URBR |
| Urtica dioica ssp. holosericea | Urtica dioica L. var. holosericea (Nutt.) C.L. Hitchc. | URDIH2 |
| Urtica dioica ssp. holosericea | Urtica dioica L. var. occidentalis S. Wats. | URDIO |
| Urtica dioica ssp. holosericea | Urtica gracilis Ait. ssp. holosericea (Nutt.) W.A. Weber | URGRH |
| Urtica dioica ssp. holosericea | Urtica gracilis Ait. var. greenei (Jepson) Jepson | URGRG |
| Urtica dioica ssp. holosericea | Urtica gracilis Ait. var. holosericea (Nutt.) Jepson | URGRH2 |
| Urtica dioica ssp. holosericea | Urtica holosericea Nutt. | URHO2 |
| Urtica dioica ssp. holosericea | Urtica trachycarpa Weddell | URTR2 |
| verdolaguilla | Pilea parietaria (L.) Blume | PIPA7 |
| Virgin Island clearweed | Pilea sanctae-crucis Liebm. | PISA4 |
| Waimea pipturus | Pipturus albidus (Hook. & Arn.) Gray | PIAL2 |
| West Indian clearweed | Pilea inaequalis (Juss. ex Poir.) Weddell | PIIN2 |
| West Indian false nettle | Boehmeria repens (Griseb.) Weddell | BORE3 |
| West Indian woodnettle | Laportea aestuans (L.) Chew | LAAE |
| western stingingnettle | Hesperocnide tenella Torr. | HETE5 |
| woodland ma'oloa | Neraudia sericea Gaud. | NESE2 |