Hackberry, American Celtis occidentalis Elm
Hairy panus Panus rudis Gilled Mushrooms
Hammered shield lichen Parmelia sulcata Lichen
Harbinger-of-Spring/ Pepper-and-Salt Erigenia bulbosa Parsley
Hardhack (see Steeplebush/ Hardhack)
Haw, Smooth Black Viburnum prunifolium Honeysuckle
Hawksbeard, Narrow-Leaved Crepis tectorum Dandelion-Like
Hawkweed, Hairy Hieracium gronovi Dandelion-Like
Hawkweed, Mouse-Ear Hieracium pilosella Dandelion-Like
Hawkweed, Orange/ Devil's Paintbrush Hieracium aurantiacum Dandelion-Like
Hawkweed, Panicled Hieracium paniculatum Composite
Hawkweed, Rough Hieracium scabrum Dandelion-Like
Hawkweed, Yellow (see Johnny-Jump-Up/ Heartsease)
Hawthorn Crataegus Rose
Hazelnut, American Corylus americana Birch
Heal-All Prunella vulgaris Mint
Heartsease (see Johnny-Jump-Up/ Heartsease)
Hedge-Hyssop, Clammy Gratiola neglecta Snapdragon (Figwort)
Hedge-mustard, hairy-pod Sisymbrium officinale Mustard
Hedge-Nettle, Rough/ Woundwort Stachys tenuifolia Mint
Hedgehog coral Hericium coralloides Miscellaneous Fungi
Hellbore, False/ Corn Lily/ Indian Poke Veratrum viride Lily
Hemlock, Canada (see Hemlock, Eastern)
Hemlock, Eastern Tsuga canadensis Pine
Hemlock, Poison Conium maculatum Parsley
Hemp, Bog (see Nettle, False/ Bog Hemp)
Hemp, Indian Apocynum cannabium Dogbane
Hemp-Nettle Galeopsis tetrahit Mint
Hen of the woods Grifolia frondosa Mushrooms With Pores (Polypores)
Henbit Lamium amplexicaule Mint
Hepatica, Sharp-Lobed Hepatica acutiloba Buttercup
Hercules Club Aralia spinosa Ginseng
Hickory, Big-bud (see Hickory, Mockernut)
Hickory, Bitternut Carya cordiformis Walnut
Hickory, Broom (see Hickory, Pignut)
Hickory, Mockernut (see Hickory, Shagbark)
Hickory, Pignut Carya glabra Walnut
Hickory, Scalybark (see Hickory, Shagbark)
Hickory, Shagbark Carya ovata Walnut
Hickory, Smooth Bark (see Hickory, Pignut)
Hickory, White (see Hickory, Mockernut)
Hoary rosette lichen Physcia aipolia Lichen
Hobblebush Viburnum alnifolium Honeysuckle
Hog-Peanut Amphicarpa bracteata Pea
Holly, American/ Christmas Holly Ilex opaca Holly
Holly, Christmas (see Holly, American/ Christmas Holly)
Hollyhock Alcea rosea Mallow
Honesty Lunaria annua Mustard
Honewort Cryptotaenia canadensis Parsley
Honey mushroom Armillaria mellea Gilled Mushrooms
Honeysuckle, Japanese Lonerica japonica Honeysuckle
Honeysuckle, Limber Lonicera dioica Honeysuckle
Honeysuckle, Morrow Lonicera morrowi Honeysuckle
Honeysuckle, Smooth-leaved (see Honeysuckle, Limber)
Honeysuckle, Tartarian Lonicera tatarica Honeysuckle
Hooded tube lichen Hypogymnia physodes Lichen
Hoof fungus (see Polypore, tinder)
Hop hornbeam disc Aleurodiscus oaksii Crusts And Slimes
Hop, Common/ European Hop Humulus lupulus Hemp
Hop, European (see Hop, Common/ European Hop)
Hop, Japanese Humulus scandens Hemp
Hop-Hornbeam Ostrya virginiana Birch
Hop-hornbeam, American (see Hop-Hornbeam)
Hop-hornbeam, eastern (see Hop-Hornbeam)
Hornbeam, American (see Ironwood)
Horse-balm Collinsonia canadensis Mint
Horse-nettle Solanum carolinense Tomato/Nightshade
Horsechestnut Aesculus hippocastanum Horsechestnut
Horsemint, European Mentha longifolia Mint
Horsetail, Field Equisetum arvense Horsetail
Horsetail, smooth Equisetum laevigatum Horsetail
Horseweed/ Canada Fleabane Erigeron canadensis No Obvious Symmetry
Houstonia, Narrow-Leaved Houstonia tenuifolia Bedstraw (Madder)
Hyacinth, Grape Muscari botryoides Lily
Hydrangea, oakleaf Hyrangea quercifolia Saxifrage
Hydrangea, panicle Hydrangea paniculata Sedge
Hydrangea, Wild Hydrangea arborescens Saxifrage
Hypoxilon canker (see Bisquit batter)
Epigaea repens
Vaccinium angustifolium
Vaccinium myrtilloides
Kalmia latifolia
Rhododendron maximum
Oxydendrum arboreum
Gaultheria procumbens
Humulus lupulus
Humulus scandens
Ilex opaca
Viburnum recognitum
Sambucus pubens
Sambucus canadensis
Viburnum prunifolium
Viburnum alnifolium
Lonerica japonica
Lonicera dioica
Lonicera morrowi
Lonicera tatarica
Viburnum lentago
Symphoricarpos albus
Viburnum trilobum
Viburnum acerifolia
Aesculus glabra
Aesculus octandra
Aesculus hippocastanum
Equisetum arvense
Equisetum laevigatum
Equisitum hyemale