86b. Leaf-blade spatulate, with rounded tip =Everlasting, Antennaria occidentalis.=
87a. Styles crimson =Everlasting, Antennaria neglecta.=
87b. Styles pale yellow =Everlasting, Antennaria petaloidea.=
88a. Erect; involucral bracts pearly white (4-9 dm. high) =Pearly Everlasting, Anaphalis margaritacea.=
88b. Erect; involucral bracts dull white or pale brown, somewhat p.u.b.escent (4-8 dm. high) (Cudweed) --89.
88c. Diffusely branched; heads in dense cl.u.s.ters; bracts brown (1-2 dm. high) =Cudweed, Gnaphalium uliginosum.=
89a. Leaves decurrent on the stem =Cudweed, Gnaphalium decurrens.=
89b. Leaves not decurrent on the stem =Cudweed, Gnaphalium polycephalum.=
90a. Twining vine (flowers white, summer) =Hemp Weed, Mikania scandens.=
90b. Not twining or climbing --91.
91a. Involucral bracts deeply fringed at the tip (flowers purple, blue, or rarely white, summer; 3-6 dm. high) --92.
91b. Involucral bracts entire or nearly so --93.
92a. Upper leaves linear or narrowly lanceolate =Corn Flower, Centaurea cya.n.u.s.=
92b. Upper leaves oblong or oblong-lanceolate =Knapweed, Centaurea nigra.=
93a. Pappus none or a short ring or crown (5-10 dm. high; flowers yellow, summer) =Costmary, Chrysanthemum balsamita var. tanacetoides.=
93b. Pappus of 2-4 stiff awns (2-15 dm. high; flowers yellow, late summer) (Bur Marigold) --130.
93c. Pappus of hairs or bristles --94.
94a. Leaves linear or narrowly lanceolate, entire; heads never in a large flat-topped cl.u.s.ter --95.
94b. Leaves not linear --99.
95a. Heads showy, purple, in a long spike or raceme (late summer) (Blazing Star) --96.
95b. Heads not showy, in a loose panicle or raceme --240b.
96a. Involucral bracts rounded at the tip, appressed (5-15 dm.
high) --97.
96b. Involucral bracts pointed (3-6 dm. high) --98.
97a. Heads 8-12-flowered =Blazing Star, Liatris spicata.=
97b. Heads with 25 flowers or more =Blazing Star, Liatris scariosa.=
98a. Involucral bracts long-ac.u.minate, spreading =Blazing Star, Liatris squarrosa.=
98b. Involucral bracts mucronate, appressed =Blazing Star, Liatris cylindracea.=
99a. Flowers yellow (2-8 dm. high) --172b.
99b. Flowers bright-red or purple, in flat-topped cl.u.s.ters (8-20 dm.
high; late summer) (Ironweed) --100.
99c. Flowers blue (3-8 dm. high; late summer) =Mist Flower, Eupatorium coelestinum.=
99d. Flowers flesh-color, pink, cream-color, or white (flowers in summer) --103.
100a. Leaves glabrous beneath or minutely p.u.b.escent; heads 15-30-flowered --101.
100b. Leaves tomentose beneath; heads 30-50-flowered --102.
101a. Inflorescence densely crowded; usually 1 m. or less high =Ironweed, Vernonia fasciculate.=
101b. Inflorescence loose and open, 15-30 cm. wide; 1-2 m. high =Ironweed, Vernonia altissima.=
102a. Pappus tawny in color =Ironweed, Vernonia missurica.=
102b. Pappus purple =Ironweed, Vernonia illinoensis.=
103a. Leaves alternate --104.
103b. Leaves opposite --106.
103c. Leaves whorled (1-3 m. high; flowers pink or purple, late summer) (Joe-Pye Weed) --107.
104a. Heads 5-flowered (5-20 dm. high; flowers white or pinkish, late summer) (Indian Plantain) --105.
104b. Heads 10 25-flowered (5-10 dm. high; flowers white, late summer) =False Boneset, Kuhnia eupatorioides.=
104c. Heads with more than 50 flowers (3-20 dm. high; flowers white, summer) =Fireweed, Erecht.i.tes hieracifolia.=
105a. Leaves entire, with many veins from base to apex =Indian Plantain, Cacalia tuberosa.=
105b. Leaves sharply serrate =Indian Plantain, Cacalia suaveolens.=
105c. Leaves broadly triangular or kidney-shape, sinuate or entire =Indian Plantain, Cacalia atriplicifolia.=
106a. Leaves united at the base (5-15 dm. high) =Boneset, Eupatorium perfoliatum.=
106b. Leaves sessile but not united at the base (5-15 dm. high) =Upland Boneset, Eupatorium sessilifolium.=
106c. Leaves petioled (4-12 dm. high) =White Snakeroot, Eupatorium urticaefolium.=