Asteraceae/Anthemideae -- disc & ray fls, predominantly yellow; style forks fat Y-shaped, flat-topped tips; lvs alternate; invol bracts rather dry & scarecely herbaceous; anthers obtuse: Achillea, Anthemis, Artemisia, Chrysanthemum, Matricaria, Tanacetum

Asteraceae/Astereae -- disc & ray fls, predominantly yellow; style forks fat, hairy on tips; lvs alt; invol bracts in several series, imbricate or subequal: Aster, Baccharis, Boltonia, Chrysopsis, Conyza, Erigeron, Euthamia, Grindelia, Solidago

Asteraceae/Cynareae -- disc fls, yellow in only a few species; style forks together m-shaped; lvs alt; Arctium, Carduus, Carlina, Centaurea, Cirsium, Cnicus, Echinops, Onopordum

Asteraceae/Eupatorieae -- disc fls; tubular fls, yellow in only a few species; style forks Y-shape; mostly whorled or opposite: Eupatorium, Kuhnia, Liatris, Mikania

Asteraceae/Heliantheae --disc & ray fls, predominantly yellow; style forks Y-shape, very hairy at tips to way down; lvs mostly opposite: Bidens, Helianthus, Rudbeckia, Verbesina

Asteraceae/Inuleae -- disc & ray fls; style forks fat, hairy at tips; lvs alternate; anthers strongly tailed at base: Anaphalis, Antennaria, Filago, Gnaphalium, Inula, Pluchea

Asteraceae/Lactuceae -- all ray flowers like dandelion; colors various; style forks make Y-shape; juice us milky: Chondrilla, Crepis, Hieracium, Hypochoeris, Krigia, Lactuca, Lapsana, Leontodon, Picris, Prenanthes, Sonchus, Taraxacum, Tragopogon

Asteraceae/Senecioneae -- disc & ray fls, predominantly yellow; invol bracts mostly equal: Cacalia, Erechtities, Petasites, Senecio, Tussilago

Asteraceae/Vernonieae -- disc fls; yellow in only a few species; style forks make V-shaped, pointed tips; alternate lvs: Elaphantopus, Vernonia

Astragalus canadensis (Canada milk vetch) Fabaceae (5 5 10 1 perf or unisex; peri) 266 -- fls cream or yellowish

Astranthium integrifolium Asteraceae/Astereae 563 --

Athyrium filix-femina (lady fern) -- 3-cut; bladelets very pointed at tip; green stalk; moist woods

Athyrium filix-femina f. rubella (red-stiped lady fern) -- 3-cut

Athyrium pycnocarpon (narrow-leaved gladefern) -- 1-cut

Athyrium thelypteroides (silvery gladefern) -- 2 cut; wooded slopes, esp on streambanks, in alluvial soil

Athyrium sp. (gladefern) Aspleniaceae 019 -- frdots like filled tacos

Atriplex arenaria (sea beach orache) Chenopodiaceae (0 3-5 3-5 0/0 3-5 0 2) 091 --

Atriplex hortensis (orache) Chenopodiaceae (0 3-5 3-5 0/0 3-5 0 2) 091 --

Atriplex patula (spearscale) Chenopodiaceae (0 3-5 3-5 0/0 3-5 0 2) 091 --

Aureolaria flava (smooth false foxglove) Scrophulariaceae/Buchnereae ((5) (5) 2+2 1 stigmas 2) 450 -- smooth stem; very lobed, wide sinuses

Aureolaria pedicularia (false foxglove) Scrophulariaceae/Buchnereae ((5) (5) 2+2 1 stigmas 2) 450 -- hairy stem; lobed but narrow sinuses

Aureolaria virginica (downy false foxglove) Scrophulariaceae/Buchnereae ((5) (5) 2+2 1 stigmas 2) 451 -- downy stem; tri-lobed

Avena fatua (wild oats) Poaceae 710 --

Avena sativa (oats) Poaceae 710 -- cultivated species of oat; two big scales; big fls that hang down; fields, waste pls.

Avena sterilis Poaceae 710 --

Axyris Chenopodiaceae (0 3-5 3-5 0/0 3-5 0 2)

Azolla caroliniana (water fern)

B

Baccharis halimifolia (groundsel tree) Asteraceae/Astereae 562 -- whitish; dioecious; AT toothed at tip

Ballota nigra (black horehound) Lamiaceae ((5) (5) 2+2 1) 424 -- pink or purple fls in short-stalked cymes from axils: OT egg

Baptisia australis (blue false indigo) Fabaceae (5 5 10 1 perf or unisex; peri) 258 -- moist places

Baptisia bracteata Fabaceae (5 5 10 1 perf or unisex; peri) 258

Baptisia tinctoria (yellow wild indigo) Fabaceae (5 5 10 1 perf or unisex; peri) 259 -- dry, sterile or sandy soil

Barbarea verna (spring wintercress) Brassicaceae (4 4 4+2 1) 178 -- basal lvs 8-20 lobed

Barbarea vulgaris (common wintercress) Brassicaceae (4 4 4+2 1) 178 -- basal lvs 2-8 lobed

Bartonia paniculata (climbing partonia) Gentianaceae ((4) 4 4 1) 367 --

Bartonia virginica (upright bartonia) Gentianaceae ((4) 4 4 1) 367 --

Bassia hirsuta (hirsute bassia) Chenopodiaceae (0 5 5 2+) 090

Bassia hyssopifolia Chenopodiaceae (0 5 5 2+) 090 --

Beckmannia syzigachne Poaceae 720 --

Belamcanda chinensis (blackberry lily) Iridaceae (3 3 3 3) 807 -- orange, purple-spotted; AE iris-like

Bellis perennis (English daisy) Asteraceae/Astereae 563 --

Berberidaceae (barberry) -- Berberis; Caulophyllum (blue cohosh); Podophyllum (may apple)

Berberis thunbergii (Japanese barberry) Berberidaceae (6 6 6 1) 062 -- WE spatulate-lvd

Berberis vulgaris (common or European barberry) Berberidaceae (6 6 6 1) 062 -- WT obovate or obovate-oblong

Berteroa incana (hoary alyssum) Brassicaceae (4 4 4+2 1) 168 -- pets white, notched; fr small oblong pods on log stalks hugging stem

Berula erecta Apiacee (5 5 5 2 epi) 355 -- white pets; ADT/ADL term lflt tri-lobed; springs, bogs, shallow water

Betula alleghaniensis (yellow birch) Betulaceae 82 -- yellowish brown bark, exfoliating

Betula lenta (black birch) Betulaceae 82

Betula nigra (river birch) Betulaceae 83 -- lvs triangular; bark peeling

Betula papyrifera (paper birch) Betulaceae 83 -- bark whitish; lvs chevron-like, pubescent in the vein-axils beneath

Betula populifolia (gray birch) Betulaceae 83 -- lvs triangular, glabrous beneath; bark grayish-white with black chevrons

Betula pumila (swamp birch) Betulaceae 83 --

Betulaceae (birch) -- Alnus (alder); Betula (birch); Carpinus (musclewood); Corylus (hazel-nut); Ostrya (hop hornbeam)

Bidens aristosa 14. (midwestern beggar ticks) Asteraceae/Heliantheae 508 -- lvs divided, ray fled; outer invol bracts 8; 7 lflts; term lflt broad

Bidens beckii (water beggar ticks) Asteraceae/Heliantheae 508 -- aquatic; ray fls; two lf forms: pom-oms & OE

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