genus hygrocybe genus hygrophorus genus hygrotrama genus hyla genus hylactophryne genus hylobates genus hylocereus genus hylocichla genus hylophylax genus hymenaea genus hymenanthera genus hymenophyllum genus hynerpeton genus hyoscyamus genus hypentelium genus hypericum genus hyperoglyphe genus hyperoodon genus hyphantria genus hypochaeris genus hypochoeris genus hypoderma genus hypopachus genus hypopitys genus hypoxis genus hypsiglena genus hypsiprymnodon genus hyracotherium genus hyssopus genus iberis genus ibero-mesornis genus ibis genus ichthyosaurus genus ichthyostega genus ictalurus genus icteria genus icterus genus ictiobus genus ictonyx genus idesia genus iguana genus iguanodon genus ilex genus iliamna genus illecebrum genus illicium genus impatiens genus inachis genus indigofera genus indri genus inga genus inula genus ipomoea genus irena genus iresine genus iridoprocne genus iris genus irvingia genus isatis genus ischigualastia genus isoetes genus isopyrum genus istiophorus genus isurus genus iva genus ixia genus ixobrychus genus ixodes genus jabiru genus jacksonia genus jacquinia genus jaculus genus jambos genus jamesonia genus jasminum genus jatropha genus javanthropus genus jordanella genus juglans genus junco genus juncus genus juniperus genus jynx genus kakatoe genus kalmia genus kalotermes genus katsuwonus genus kennedia genus kennedya genus kenyapithecus genus keteleeria genus khaya genus kiggelaria genus kinosternon genus kirkia genus klebsiella genus knightia genus kniphofia genus kobus genus kochia genus koellia genus kogia genus kohleria genus kolkwitzia genus kosteletzya genus krigia genus krypterophaneron genus kyphosus genus lablab genus laburnum genus laccopetalum genus lacerta genus lachnolaimus genus lactarius genus lactobacillus genus lactophrys genus lactuca genus laelia genus lagarostrobus genus lagenaria genus lagenophera genus lagerstroemia genus lagidium genus lagodon genus lagopus genus lagorchestes genus lagostomus genus lagothrix genus laguncularia genus lama genus lambertia genus lambis genus laminaria genus lamium genus lamna genus lampris genus lampropeltis genus languas genus lanius genus lansium genus lanthanotus genus laportea genus lappula genus lardizabala genus larix genus larrea genus larus genus lasiocampa genus lasiurus genus lasthenia genus lastreopsis genus lates genus lathyrus genus latimeria genus latrodectus genus laurus genus lavandula genus lavatera genus layia genus lebistes genus lecanopteris genus lecanora genus leccinum genus ledum genus leiopelma genus leiophyllum genus leipoa genus leishmania genus leitneria genus lemaireocereus genus lemmus genus lemna genus lemur genus lens genus lentinus genus leonotis genus leontideus genus leontocebus genus leontodon genus leontopodium genus leonurus genus lepas genus lepechinia genus lepidium genus lepidobotrys genus lepidochelys genus lepidocybium genus lepidothamnus genus lepiota genus lepisma genus lepisosteus genus lepomis genus leptarrhena genus leptinotarsa genus leptodactylus genus leptoglossus genus leptopteris genus leptoptilus genus leptospira genus leptotyphlops genus lepus