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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