Index
- Abutilon theophrasti, butter-print velvet-leaf
- Acer negundo, box-elder
- Acer platanoides, Norway maple
- Acer rubrum, red maple
- Acer saccharinum, silver maple
- Acer saccharum, sugar maple
- Acer spicatum, mountain maple
- Achillea millefolium, yarrow, milfoil
- Actaea pachypoda, white baneberry, doll's eyes
- Adiantum pedatum, northern maidenhair fern
- Adlumia fungosa, Allegheny-vine
- Agalinis fasciculata, beach falsefoxglove, purple falsefoxglove
- Agalinis maritima, saltmarsh falsefoxglove
- Agalinis purpurea, large purple false-foxglove, purple gerardia
- Agalinis tenuifolia, slender falsefoxglove
- Ageratina altissima, white snakeroot
- Ageratina aromatica, wild hoarhound
- Agrimonia striata, roadside agrimony
- Ajuga reptans, carpet-bugle
- Albizia julibrissin, mimosa, silk tree
- Alliaria petiolata, garlic-mustard
- Allium canadense, wild onion, meadow garlic
- Allium vineale, field garlic
- Alnus incana subsp. rugosa, speckled alder
- Alnus serrulata, hazel alder
- Amaranthus blitum, prostrate pigweed
- Amaranthus hybridus, common pigweed
- Amaranthus viridis, green amaranth
- Ambrosia artemisiifolia, annual ragweed
- Amelanchier arborea, serviceberry
- Amorpha fruticosa, false indigo-bush, bastard-indigo
- Anagallis arvensis, scarlet pimpernel
- Andromeda polifolia var. glaucophylla, bog rosemary
- Andropogon virginicus, broomsedge bluestem
- Antennaria plantaginifolia, plantain-leaved pussytoes
- Apios americana, American groundnut
- Apocynum cannabinum, Indian hemp, dogbane
- Aquilegia canadensis, wild columbine, red columbine
- Aralia racemosa, American spikenard
- Aralia spinosa, devil's-walkingstick
- Arctium lappa, burdock
- Arenaria serpyllifolia, thyme-leaved sandwort
- Argemone mexicana, Mexican pricklypoppy
- Aronia melanocarpa, black-fruited chokeberry
- Asarum canadense, wild ginger
- Asclepias exaltata, tall milkweed
- Asclepias incarnata, swamp milkweed
- asclepias syriaca, common milkweed
- Asclepias tuberosa, butterflyweed
- Asclepias verticillata, whorl-leaf milkweed
- Asclepias viridiflora, green-flowered milkweed
- Asimina parviflora, small-fruited pawpaw
- Asimina triloba, common pawpaw, dog-banana, Indian-banana
- Asparagus officinalis, garden aparugus-fern asparagus
- Azolla caroliniana, mosquito fern
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