United States

Aconite

Aconitum napellus

Critically Endangered

Admiralty Island Meadow Vole (Admiraltiae)

Microtus pennsylvanicus

Agrimony

Agrimonia eupatoria

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

hard-grass

Parapholis strigosa

Hardhack

Spiraea tomentosa

Hard Maple

Acer saccharum

Hard Pine

Pinus rigida

Hard Shield Fern

Polystichum aculeatum

Hard wallflower

Erysimum marschallianum

Hardy Cyclamen

Cyclamen hederifolium

Hardy fuchsia

Fuchsia magellanica

Hardy swamplily

Crinum bulbispermum

Hare'S Ear

Otidea onotica

Hare's ear mustard

Conringia orientalis

Hare'S Foot Inkcap

Coprinopsis lagopus

Hare's-tail

Lagurus ovatus

Harison'S Yellow Rose

Rosa harisonii

Harlequin Darner

Gomphaeschna furcillata

Harlequin Flower

Capnoides sempervirens

Harlequin glorybower

Clerodendrum trichotomum

Harmal peganum

Peganum harmala

Harpoon Clubtail

Phanogomphus descriptus

Harris mud crab

Rhithropanopeus harrisii

Harris' Sparrow

Zonotrichia querula

Hartman'S Dry Rock Moss

Grimmia hartmanii

Hart'S Tonguefern

Asplenium scolopendrium

Harvest-Lice

Agrimonia parviflora

Haspan flatsedge

Cyperus haspan

Hastings riverbank ground beetle

Bembidion properans

Hatcher s pawwort

Barbilophozia hatcheri

Critically Endangered

hato tejas

Microstachys corniculata

Hawai'i yelloweyed grass

Xyris complanata

Hawk's-beard

Crepis pulchra

Hawkweed Oxtongue

Picris hieracioides

Haworth's aeonium

Aeonium haworthii

Hazel Bracket

Skeletocutis semipileata

Hazel sterculia

Sterculia foetida

Hazel Woodwart

Hypoxylon fuscum

Heartleaf horsenettle

Solanum cardiophyllum

Heartleaf madeiravine

Anredera cordifolia

heartleaf twayblade

Neottia cordata

Heart-Leaved Pondweed

Potamogeton pulcher

heart-leaved spear moss

Calliergon cordifolium

Heart-Pod Hoary Cress

Lepidium draba

Heath bedstraw

Galium saxatile

Heath Cudweed

Omalotheca sylvatica

heather ladybird

Chilocorus bipustulatus

Heath Knot-Horn

Apomyelois bistriatella

Heath Navel

Lichenomphalia umbellifera

Heath Threadwort

Cephaloziella stellulifera

Data Deficient

Heath Waxcap

Gliophorus laetus

Heath woodrush

Luzula congesta

Hedge bamboo

Bambusa multiplex

Hedgehog arion

Arion intermedius

Hedgehog Clover

Trifolium echinatum

Hedgehog gourd

Cucumis dipsaceus

Hedgehog Puffball

Lycoperdon echinatum

Endangered

Hedgemustard

Sisymbrium officinale

Hedge-Nettle

Stachys palustris

Hedgerow Crane'S-Bill

Geranium pyrenaicum

Heller'S Notchwort

Crossocalyx hellerianus

Hemerocallis gall midge

Contarinia quinquenotata

hemlock scale

Dynaspidiotus abietis