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 ½ 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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