Aconite, Winter Eranthis hyemalis Buttercup
Adder's Tongue (see Lily, Trout/ Dogtooth Violet/ Yellow Adder's-tongue)
Agrimony Agrimonia Rose
Alder, Gray (see Alder, Speckled)
Alder, Snapping (see Witch Hazel, common)
Alder, Speckled Alnus rugosa Birch
Alder, Tag (see Alder, Speckled)
Alexanders (see Angelica/ Alexanders)
Alexanders, golden Zizia aurea Parsley
Alfalfa Medicago sativa Pea
Allspice (see Spicebush, common)
Alyssum, Sweet Lobularia maritime Mustard
Amaranth, Green (see Pigweed, Slender/ Green Amaranth)
Anemone, Tall (see Thimbleweed/ Tall Anemone)
Anemone, Wood Anemone quinquefolia Buttercup
Angelica/ Alexanders Angelica atropurpurea Parsley
Aniseroot/ Sweet anise Osmorhiza longistylus Parsley
Arbutus, Trailing Epigaea repens Heath
Arrowhead, Broad-leaved/ Duck Potato/ Wapato Sagittaria latifolia Arrowhead/Water Plantain
Arrowwood, Northern/ Toothed Arrowwood Viburnum recognitum Honeysuckle
Arrowwood, Toothed (see Arrowwood, Northern/ Toothed Arrowwood)
Arum, Arrow/ Tuckahoe Peltandra virginica Arum/Calla
Ash, White Fraxinus americana Olive
Asparagus Asparagus officinalis Lily
Aspen, Big-tooth Populus grandidentata Willow
Aspen, Large Tooth (see Aspen, Big-tooth)
Aspen, Quaking Populus tremuloides Willow
Aspen, Trembling (see Aspen, Quaking)
Aster, Calico Aster lateriflorus Aster-Like
Aster, Crooked-stemmed Aster prenanthoides Aster-Like
Aster, Flat-topped White Aster umbellatus Aster-Like
Aster, Frost-weed/ Heath Aster Aster pilosus Aster-Like
Aster, Heart-leaved Aster cordifolius Aster-Like
Aster, Heath (see Aster, Frost-weed/ Heath Aster)
Aster, Large-leaved Aster macrophyllus Composite
Aster, Late Purple/ Spreading Aster Aster patens Aster-Like
Aster, Lowrie's Aster lowrieanus Aster-Like
Aster, Mountain (see Aster, Whorled Wood)
Aster, New England Aster novae-angliae Aster-Like
Aster, Panicled Aster simplex Aster-Like
Aster, Purple-stemmed Aster puniceus Aster-Like
Aster, Schreber's Aster schreberi Aster-Like
Aster, Sharp-leaved (see Aster, Whorled Wood)
Aster, Small White Aster vimineus Aster-Like
Aster, Spreading (see Aster, Late Purple/ Spreading Aster)
Aster, White Wood Aster divaricatus Aster-Like
Aster, Whorled (see Aster, Whorled Wood)
Aster, Whorled Wood Aster acuminatus Composite
Avens, Rough (see Avens, Rough-fruited/ Rough Avens)
Avens, Rough-fruited/ Rough Avens Geum virginianum Rose
Avens, White Geum canadense Rose
Justicia americana
Amaranthus retroflexus
Amaranthus hybridus
Galanthus nivalis
Sagittaria latifolia
Alisma triviale
Peltandra virginica
Arisaema triphyllum
Symplocarpus foetidus