| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| KOSCC | Kochia scoparia (L.) Schrad. var. culta Farw. | Kochia scoparia | Chenopodiaceae
|
| KOSCP | Kochia scoparia (L.) Schrad. var. pubescens Fenzl | Kochia scoparia | Chenopodiaceae
|
| KOSCS | Kochia scoparia (L.) Schrad. var. subvillosa Moq. | Kochia scoparia | Chenopodiaceae
|
| KOSCT | Kochia scoparia (L.) Schrad. var. trichophila (Stapf) Bailey | Kochia scoparia | Chenopodiaceae
|
| KOSC | Kochia scoparia (L.) Schrad. | Mexican-fireweed | Chenopodiaceae
|
| KOSI3 | Kochia sieversiana (Pallas) C.A. Mey. | Kochia scoparia | Chenopodiaceae
|
| KOTR2 | Kochia trichophila Stapf | Kochia scoparia | Chenopodiaceae
|
| KOVE | Kochia vestita (S. Wats.) Rydb. | Kochia americana | Chenopodiaceae
|
| KOCHI | Kochia Roth | molly | Chenopodiaceae
|
| KOSPS | Koeberlinia spinosa Zucc. var. spinosa | crown of thorns | Capparaceae
|
| KOSPT | Koeberlinia spinosa Zucc. var. tenuispina Kearney & Peebles | crown of thorns | Capparaceae
|
| KOSP | Koeberlinia spinosa Zucc. | crown of thorns | Capparaceae
|
| KOEBE | Koeberlinia Zucc. | allthorn | Capparaceae
|
| KOASA | Koeleria asiatica Domin ssp. atroviolacea (Domin) Tzvelev | Eurasian Junegrass | Poaceae
|
| KOAS | Koeleria asiatica Domin | Eurasian Junegrass | Poaceae
|
| KOAT | Koeleria atroviolacea Domin | Koeleria asiatica ssp. atroviolacea | Poaceae
|
| KOCA2 | Koeleria cairnesiana Hult�n | Koeleria asiatica ssp. atroviolacea | Poaceae
|
| KOCRL | Koeleria cristata Pers. var. longifolia Vasey ex Burtt-Davy | Koeleria macrantha | Poaceae
|
| KOCRP | Koeleria cristata Pers. var. pinetorum Abrams | Koeleria macrantha | Poaceae
|
| KOCR | Koeleria cristata auct. p.p. non Pers. | Koeleria macrantha | Poaceae
|
| KOGE | Koeleria gerardii (Vill.) Shinners | Rostraria cristata | Poaceae
|
| KOGR2 | Koeleria gracilis Pers. | Koeleria macrantha | Poaceae
|
| KOMA | Koeleria macrantha (Ledeb.) J.A. Schultes | prairie Junegrass | Poaceae
|
| KONI | Koeleria nitida Nutt. | Koeleria macrantha | Poaceae
|
| KOPH | Koeleria phleoides (Vill.) Pers. | Rostraria cristata | Poaceae
|
| KOPY | Koeleria pyramidata auct. p.p. non (Lam.) Beauv. | Koeleria macrantha | Poaceae
|
| KOYU | Koeleria yukonensis Hult�n | Koeleria macrantha | Poaceae
|
| KOELE | Koeleria Pers. | Junegrass | Poaceae
|
| KOGR | Koellensteinia graminea (Lindl.) Reichenb. f. | grassleaf orchid | Orchidaceae
|
| KOELL | Koellensteinia Reichenb. f. | koellensteinia | Orchidaceae
|
| KOAL4 | Koellia albescens (Torr. & Gray) Kuntze | Pycnanthemum albescens | Lamiaceae
|
| KOAR | Koellia aristata (Michx.) Kuntze | Pycnanthemum setosum | Lamiaceae
|
| KOBE2 | Koellia beadlei Small | Pycnanthemum beadlei | Lamiaceae
|
| KOCL | Koellia clinopodioides (Torr. & Gray) Kuntze | Pycnanthemum clinopodioides | Lamiaceae
|
| KOCU | Koellia curvipes Greene | Pycnanthemum curvipes | Lamiaceae
|
| KODU | Koellia dubia (Gray) Small | Pycnanthemum incanum var. incanum | Lamiaceae
|
| KOFL | Koellia flexuosa auct. non (Walt.) MacM. | Pycnanthemum tenuifolium | Lamiaceae
|
| KOHU | Koellia hugeri Small | Pycnanthemum flexuosum | Lamiaceae
|
| KOHY2 | Koellia hyssopifolia (Benth.) Britt. | Pycnanthemum flexuosum | Lamiaceae
|
| KOIN | Koellia incana (L.) Kuntze | Pycnanthemum incanum var. incanum | Lamiaceae
|
| KOLE | Koellia leptodon (Gray) Small | Pycnanthemum verticillatum var. verticillatum | Lamiaceae
|
| KOMO | Koellia montana (Michx.) Kuntze | Pycnanthemum montanum | Lamiaceae
|
| KOMU | Koellia multiflora Small | Pycnanthemum curvipes | Lamiaceae
|
| KOMU2 | Koellia mutica (Michx.) Kuntze | Pycnanthemum muticum | Lamiaceae
|
| KONU | Koellia nuda (Nutt.) Kuntze | Pycnanthemum nudum | Lamiaceae
|
| KOPA2 | Koellia pauciflora Small | Pycnanthemum albescens | Lamiaceae
|
| KOPI | Koellia pilosa (Nutt.) Britt. | Pycnanthemum verticillatum var. pilosum | Lamiaceae
|
| KOPY2 | Koellia pycnanthemoides (Leavenworth) Kuntze | Pycnanthemum pycnanthemoides var. pycnanthemoides | Lamiaceae
|
| KOVE3 | Koellia verticillata (Michx.) Kuntze | Pycnanthemum verticillatum var. verticillatum | Lamiaceae
|
| KOVI3 | Koellia virginiana (L.) MacM. | Pycnanthemum virginianum | Lamiaceae
|
| KOAP2 | Koelreuteria apiculata Rehder & E. Wilson | Koelreuteria paniculata | Sapindaceae
|
| KOBI3 | Koelreuteria bipinnata Franchet | goldenrain tree | Sapindaceae
|
| KOELF | Koelreuteria elegans (Seem.) A.C. Sm. ssp. formosana (Hayata) F.G. Mey. | flamegold | Sapindaceae
|
| KOEL | Koelreuteria elegans (Seem.) A.C. Sm. | flamegold | Sapindaceae
|
| KOFO | Koelreuteria formosana Hayata | Koelreuteria elegans ssp. formosana | Sapindaceae
|
| KOPA | Koelreuteria paniculata Laxm. | goldenrain tree | Sapindaceae
|
| KOVI4 | Koelreuteria vitiensis A.C. Sm. | Koelreuteria elegans ssp. formosana | Sapindaceae
|
| KOELR | Koelreuteria Laxm. | koelreuteria | Sapindaceae
|
| KOIS | Koenigia islandica L. | island purslane | Polygonaceae
|
| KOENI | Koenigia L. | koenigia | Polygonaceae
|
| KOBI2 | Koerberia biformis A. Massal. | | Placynthiaceae
|
| KOSO2 | Koerberia sonomensis (Tuck.) Henssen | | Placynthiaceae
|
| KOERB | Koerberia A. Massal. | koerberia | Placynthiaceae
|
| KOWI | Koerberiella wimmeriana (Korber) Stein | | Porpidiaceae
|
| KOERB2 | Koerberiella Stein | koerberiella | Porpidiaceae
|
| KOER3 | Kohleria eriantha (Benth.) Hanst. | | Gesneriaceae
|
| KOHLE | Kohleria Regel | kohleria | Gesneriaceae
|
| KOCO3 | Kohlmeyera complicatula (Nyl.) Schatz | | Mastodiaceae
|
| KOHLM | Kohlmeyera Schatz | kohlmeyera | Mastodiaceae
|
| KOVE2 | Kohlrauschia velutina (Guss.) Reichenb. | Petrorhagia dubia | Caryophyllaceae
|
| KOCO2 | Kokia cookei O. Deg. | Molokai treecotton | Malvaceae
|
| KODR | Kokia drynarioides (Seem.) Lewt. | Hawai'i treecotton | Malvaceae
|
| KOKA | Kokia kauaiensis (Rock) O. Deg. & Duvel | Kauai treecotton | Malvaceae
|
| KOLA2 | Kokia lanceolata Lewt. | Wailupe Valley treecotton | Malvaceae
|
| KORO | Kokia rockii Lewt. | Kokia drynarioides | Malvaceae
|
| KOKIA | Kokia Lewt. | treecotton | Malvaceae
|
| KOAM80 | Kolkwitzia amabilis Graebn. | beautybush | Caprifoliaceae
|
| KOLKW | Kolkwitzia Graebn. | kolkwitzia | Caprifoliaceae
|
| KOMA2 | Koniga maritima (L.) R. Br. | Lobularia maritima | Brassicaceae
|
| KOCO | Korthalsella complanata (v. Tiegh.) Engl. | Kaumahana | Viscaceae
|
| KOCYT | Korthalsella cylindrica (v. Tiegh.) Engl. var. teres (Wawra) St. John | Korthalsella cylindrica | Viscaceae
|
| KOCY | Korthalsella cylindrica (v. Tiegh.) Engl. | Hawai'i korthal mistletoe | Viscaceae
|
| KODE | Korthalsella degeneri Danser | Degener's korthal mistletoe | Viscaceae
|
| KOLAC | Korthalsella latissima (v. Tiegh.) Danser var. crassa (v. Tiegh.) Danser | Korthalsella latissima | Viscaceae
|
| KOLA | Korthalsella latissima (v. Tiegh.) Danser | Kauai korthal mistletoe | Viscaceae
|
| KOPL | Korthalsella platycaula (v. Tiegh.) Engl. | po'owaha | Viscaceae
|
| KOREW | Korthalsella remyana v. Tiegh. var. wawrae (v. Tiegh.) Danser | Korthalsella remyana | Viscaceae
|
| KORE | Korthalsella remyana v. Tiegh. | bog korthal mistletoe | Viscaceae
|
| KORE2 | Korthalsella remyi (v. Tiegh.) Skottsberg | Korthalsella complanata | Viscaceae
|
| KORTH | Korthalsella v. Tiegh. | korthal mistletoe | Viscaceae
|
| KOAR2 | Korycarpus arundinaceus Zea ex Lag. | Diarrhena americana | Poaceae
|
| KOAL2 | Kosteletzkya althaeifolia (Chapman) Rusby | Kosteletzkya virginica | Malvaceae
|
| KODE2 | Kosteletzkya depressa (L.) O.J. Blanchard, Fryxell & Bates | white fenrose | Malvaceae
|
| KOPE | Kosteletzkya pentasperma Griseb. | Kosteletzkya depressa | Malvaceae
|
| KOSM | Kosteletzkya smilacifolia Gray | Kosteletzkya virginica | Malvaceae
|
| KOVIA | Kosteletzkya virginica (L.) K. Presl ex Gray var. althaeifolia Chapman | Kosteletzkya virginica | Malvaceae
|
| KOVIA2 | Kosteletzkya virginica (L.) K. Presl ex Gray var. aquilonia Fern. | Kosteletzkya virginica | Malvaceae
|
| KOVI | Kosteletzkya virginica (L.) K. Presl ex Gray | Virginia saltmarsh mallow | Malvaceae
|
| KOSTE | Kosteletzkya K. Presl | kosteletzkya | Malvaceae
|
| KOAU | Koyamacalia auriculata (DC.) H.E. Robins. & Brett. | Parasenecio auriculata | Asteraceae
|
| KRER | Krameria erecta Willd. ex J.A. Schultes | littleleaf ratany | Krameriaceae
|