Amelanchier sp. (shadbush) Rosaceae (5 5 N 5) 254-255
Amelanchier spicata (dwarf shad bush) Rosaceae (5 5 N 5) 254 --
Amianthium muscitoxicum (fly poison) Liliaceae (3 3 6 3) 782 --
Ammannia coccinea (scarlet tooth cup) Lythraceae (4 4 4 1 peri) 291 --
Ammannia latifolia (broad-leaved tooth cup) Lythraceae (4 4 4 1 peri) 291 --
Ammannia robusta (robust tooth cup) Lythraceae (4 4 4 1 peri) 292 --
Ammophila breviligulata (beach grass) Poaceae 717
Amorpha fruticosa (false indigo) Fabaceae (5 5 10 1 perf or unisex; peri) 283 --
Ampelopsis brevipedunculata (porcelain berry) Vitaceae (5 5 5 1 perf or unisex; hypo) 323 -- lfs 3-5 lobed w deep sinuses,big lobes also lobed; green & coarsely-hairy beneath on veins
Amphicarpaea bracteata (hog peanut) Fabaceae (5 5 10 1 perf or unisex; peri) 286 -- trifoliate, thin lflts
Amphicarpum purshii (Pursh's millet grass) Poaceae 761
Amsonia tabernaemontana (common blue star) Apocynaceae ((5) (5) 5 1 hypo) 368 --
Anacardiaceae (cashew) -- Rhus (sumac), Toxicodendron (poison ivy)
Anagallis arvensis (scarlet pimpernel) Primulaceae ((5) 5 5 1) 202
Anaphalis margaritacea (pearly everlasting) Asteraceae/Inuleae 565 -- staminate heads w yellow center tuft; stem/narrow lf undersides white woolly
Anchusa arvensis (small bugloss) Boraginaceae ((5) (5) 5 1 hypo) 402 --
Anchusa azurea (showy bugloss) Boraginaceae ((5) (5) 5 1 hypo) 402 --
Anchusa officinalis (common bugloss) Boraginaceae ((5) (5) 5 1 hypo) 402 --
Andromeda glaucophylla (bog rosemary) Ericaceae ((5) 5 10 1) 187 --
Andropogon gerardii (turkey claw grass) Poaceae 773
Andropogon gyrans Poaceae 774 --
Andropogon virginicus var. abbreviatus (Virginia bush beard grass) Poaceae 775 --
Andropogon virginicus var. virginicus (Virginia broom beard grass) Poaceae 775 --
Anemone canadensis (Canadian anemone) 49 -- 2-8dm; basal lvs long-petioled, rotund, deeply 3-parted; sandy shores, damp prairies & wet meadows
Anemone cylindrica (long-headed thimbleweed anemone) -- head of achenes cylindric; dry, open woods
Anemone quinquefolia (wood anemone) 49 -- 1-2dm tall; basal lf solitary, long-petioled; lfls 3-5; moist woods
Anemone sp. (anemone) Ranunculaceae (0 4-20 N 1)
Anemone virginiana (tall thimbleweed anemone) 50 -- 3-10dm; sep greenish-white or less often white; fr thimble-like, more ovoid; dry, open woods
Anemonella thalictroides (rue anemone) Ranunculaceae (0 5-10 N 8-12) 59 --
Anethum graveolens Apiaceae (5 5 5 2) 352 --
Angelica atropurpurea (purple stem angelica) Apiaceae (5 5 5 2) 358 -- fls greenish-white; stem purple blotched; ADT w/ veiny enlarged sheaths; to 7' high
Angelica lucida (seabeach angelica) Apiaceae (5 5 5 2) 359 -- fls greenish-white
Angelica venenosa (hairy angelica) Apiaceae (5 5 5 2) 359 -- venenosa =very poisonous
Annonaceae (custard-apple) -- Asimina (pawpaw)
Anoda cristata Malvaceae (5 5 5 1 hypo) 138 Antennaria neglecta var. canadensis (field pussytoes) 566 -- lvs glabrous from the first
Antennaria neglecta var. neglecta (field pussytoes) 566 -- stolons long; curled lf tip
Antennaria neglecta var. neodioica (field pussytoes) 566 -- stolons shorter
Antennaria neglecta var. petaloidea (field pussytoes) 566 -- lf tips subulate w straight tip; stolons long
Antennaria plantaginifolia (plantain-leaved pussytoes) 566 -- lvs larger & sl. pointed; stem lvs larger
Antennaria sp. (pussytoes) Asteraceae 566 -- Anthemis arvensis (corn chamomile) Asteraceae/Anthemideae 516 --
Anthemis cotula (dogfennel chamomile) Asteraceae/Anthemideae 517 --
Anthemis tinctoria (yellow chamomile) Asteraceae/Anthemideae 516 --
Anthoxanthum aristatum (vernal grass) Poaceae 714 --
Anthoxanthum odoratum (sweet vernal grass) Poaceae 714 -- fairly short infl, reddish-green then tan; grass us. disappears by midsummer
Anthriscus caucalis Apiaceae (5 5 5 2) 378 -- fr hispid; umbels lax w/ 3-5 rays to 1-2cm
Anthriscus cerefolium Apiaceae (5 5 5 2) 347 -- fr linear; umbels lax, w/ 3-6 rays to 3 cm
Anthriscus sylvestris (wild chervil) Apiaceae (5 5 5 2) 347 -- umbels large, w/ 6-15 rays to 4cm
Anthyllis vulneraria (kidney vetch) Fabaceae (5 5 10 1 perf or unisex; peri) 268 --
Antirrhinum majus (larger snapdragon) Scrophulariaceae/Antirrhineae ((5) (5) 4 1 stigma 1) 448 --
Antirrhinum orontium (Eurasian snapdragon) Scrophulariaceaea/Antirrhineae ((5) (5) 4 1 stigma 1) 448 --
Apera interrupta Poaceae 717 --
Apera spica-venti Poaceae 717 --
Aphanes microcarpa Rosaceae (0 4 1 1) 235 -- Eurp intro into lawns & waste pls.
Apiaceae I (carrot) flat raceme -- Bupleurum, Erynigium, Hydrocotyle, Sanicula, Torilis
Apiaceae II lvs all simple -- Bupleurum, Centella, Hydrocotyle, Lilaeopsis, Oxypolis, Ptilimnium
Apiaceae III (fr & ovary hairy, etc) -- Angelica, Anthriscus, Chaerophyllum, Daucus, Heracleum, Osmorhiza, Pimpinella, Sanicula, Scandix,Torilis
Apiaceae IV (sep lflts of uniform size) -- Apium, Berula, Cryptotaenia, Heracleum, Oxypolis, Pastinaca, Pimpinella, Sium, Thasplum, Zizia
Apiaceae V a (lvs much dissected or decompound) fls yellow -- Anethum, Foeniculum, Petroselinum, Thaspium
Apiaceae V b fls wh -- Aethusa, Anthriscus, Apium, Carum, Chaerophyllum, Cicuta, Conioselinum, Conium, Coriandrum, Erigenia, Ptilimnium
Apios americana (groundnut) Fabaceae (5 5 10 1 perf or unisex; peri) 286 -- vine; brownish-purple in short racemes; 5-7 lflts egg & ptd
Apium graveolens (celery) Apiaceae (5 5 5 2) 351 -- white or greenish-white; lflts 3-9; occ escape
Aplectrum hyemale (puttyroot) Orchidaceae (2+1z 3 1-2 3) 826 -- purplish or yellow brown fls w white, magenta spotted lip; NONE
Apocynaceae (dogbane) -- Amsonia (bluestar), Apocynum (dogbane), Vinca (periwinkle)
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