Hawkweed, Large Mouse-ear
Hawkweed, Mouse-ear 
Hawkweed, Orange
Hawkweed, Yellow
Hawthorn
Heal-all
Hedge Bindweed
Helleborine
Hemlock, Bulbiferous
Hemlock, Water
Hemp, Spotted Indian
Hepatica, Round-lobed
Hepatica, Sharp-lobed
Herb Robert
Highbush Cranberry
Hog Peanut
Holly, Winterberry
Honeysuckle, Bush
Honeysuckle, Fly 
Honeysuckle, Glaucous
Honeysuckle, Tartarian
Hop Clover
Horehound, Water
Horseweed
Hyacinth, Grape
Indian Cucumber Root
Indian Pipe
Indian Tobacco
Ivy, Ground
Jack-in-the-pulpit, Common
Jack-in-the-pulpit, Small
Joe-Pye Weed
Lady's Thumb
Lamb's Quarters
Laurel, Sheep
Lettuce, Prickly
Lettuce, Tall White
Lettuce, Wild
Lily, Canada (F)
Lily, Fragrant Water
Lily, Trout
Lily, Wood
Liverwort, Green-tongued
Lobelia, Brook
Lobelia, Pale-spiked
Loosestrife, Purple
Loosestrife, Whorled
Lopseed
Lupine, Garden
Madder, Wild
Mallow, Common 
Mallow, High
Mallow, European
Marigold, Marsh (F)
Marigold, Nodding Bur
Marigold, Water 
Marjoram, Wild
May-apple
Mayflower, Canada
Mayweed 
Meadowsweet
Milkweed, Common
Milkweed, Swamp
Milk Vetch, Canadian 
Mint, Wild
Miterwort
Moccasin Flower
Moneywort
Monkey Flower
Motherwort
Mullein, Common
Mustard, Garlic 
Mustard, Tumble
Mustard, Wormseed