Common Name

Scientific Name

Common Name

Scientific Name

Hackberry

Celtis occidentalis

Hickory, bitternut

Carya cordiformis

Hairy corn salad

Valerianella amarella

Hickory, shagbark

Carya ovata

Hairy vetch

Vicia vittosa

Highbush blueberry

Vaccinium corymbosum

Halophile, extreme

Halobacterium halobium

Hog plum

Ximenia americana

Haptophytes

Chrysochro- mulina spp.

Holly, American

Ilex opaca

Haptophytes

Emiliania huxleyi

Hollyhock

Althaea rosea

Haptophytes

Pavlova spp.

Honey locust

Gleditsiatria-canthos

Haptophytes

Phaeocystis spp.

Honeysuckle

Lonicera japonica

Haptophytes

Pleurochrysis spp.

Hop tree, common

Ptelea trifoliata

Hart's tongue

Phyllitis scolopendrium

Hophornbeam

Ostrya virginiana

Hawaiian tree fern

Cibotium glaucum

Hops

Humulus lupulus

Hawthorn, black

Crataegus douglasii

Horehound

Marrubium vulgare

Hawthorn, downy

Crataegus mollis

Hornbeam, American

Carpinus caroliniana

Hawthorn, littlehip

Crataegus spaihulata

Hornworts

Anthoceros spp.

Hawthorn, red

Crataegus spp.

Hornworts

Dendroceros spp.

Hazel, California

Corylus cornuta

Horse chestnut

Aesculus hippocastanum

Helicobacterium

Helicobacter pylori

Horseradish

Armoracia rusticana

Hemlock, eastern

Tsuga canadensis

Horsetail, common

Equisetum arvense

Hemlock, poison

Conium maculata

Horsetail, wood

Equisetum sylvaticum

Hemlock, water

Cicuta maculata

Hyacinth, grape

Muscari neglectum

Hemlock varnish shelf

Ganoderma tsugae

Hyacinth, water

Eichhornia crassipes

fungus

Hydrangea

Hydrangea macrophylla

Hemp

Cannabis sativa

Hydrilla

Hydrilla verticillata

Hemp, Manila

Musa textilis

Hyperther-mophile

Pyrobaculum aerophilum

Hen and chickens

Sempervivum tectorum

Ice plant

Mesembryan-themum

Hen-of-the-woods

Grifola frondosa

crystallinum

Henbit

Lamium amplexicaule

Hibiscus

Hibiscus rosa-sinensis