Herbs erect, biennial, with basal rosette. Stems 30-200 cm tall, simple or sparsely branched, densely to very sparsely strigillose and with longer spreading and usually pustulate-based hairs, inflorescence often also glandular puberulous. Leaves green or pale green, with inconspicuous veins, sessile or shortly petiolate; rosette blade 10-30 × 2-5 cm; cauline blade narrowly oblanceolate to elliptic, 5-22 × (1-)1.5-5(-6) cm, base acute to attenuate, margin dentate to subentire, often lobed near base, apex acute. Inflorescence a dense mostly unbranched spike. Flowers open near sunset; floral tube (2-)2.5-4 cm. Sepals 1.2-2.2(-2.8) cm, with free tips 1.5-3 mm, erect. Petals yellow, fading to orange, 1.2-2.5(-3) cm. Anthers 3-6(-9) mm; pollen ca. 50% fertile. Ovary densely glandular puberulous and sparsely villous or with very sparse pustulate-based hairs, sometimes only densely strigillose; stigma surrounded by anthers. Capsules green, narrowly lanceoloid to lanceoloid, 2-4 cm, sessile. Seeds in two rows per locule, brown to nearly black, 1.1-2 mm, irregularly pitted. Fl. Jul-Oct, fr. Jul-Nov. 2n = 14, permanent translocation heterozygote; self-compatible, autogamous.
"Biennial or short-lived perennial, 0.5–2 m; lvs lanceolate to oblong, mostly 1–2 dm, acute or acuminate, entire to repand-dentate, often crisped on the margin, sessile or short-petioled, glabrous to canescent, fls in stiff, terminal, simple or branched, ± leafy-bracteate spikes; hypanthium 2–5 cm; sep 1–3 cm, their appendages terminal, 1–5 mm, connivent for most of their length before anthesis; pet yellow, 1–2.5 cm; anthers 4–7 mm; fr 1.5–4 cm, stout, tapering upwards; seeds 1.2–1.8 mm, angular-prismatic; 2n=14, a complex heterozygote. Fields, roadsides, prairies, and waste places, throughout most of the U.S. and s. Can. July–Sept. More or less divisible into 3 vars.:"
Weedy, sparsely pubescent biennial to 2 m tall; leaves lanceolate; rosette leaves sinuate-pinnatifidto denticulate, 8-30 cm long and 1-6 cm wide, their petioles long; cauline leaves denticulate, 5-16 cm long, 15-35 mm wide, subsessile; flowers opening near sunset; mature budserect; hypanthium 2-5 cm long; sepals 1-2 cm long; the free tips 1-4 mm long; petals yellow, 1-2 cm long; capsule thick, cylindric, 14-25 mm long; seeds in 2 rows in each locule, 1.2-1.8 mm long.
Stängel, Kelch und Früchte meist ohne rote Flecke und Streifen. Kronblätter (1,5–)2–3 cm lang. Narben die Staubblätter nicht überragend.
Weedy biennial herb, 0.3-2.0 m high. Leaves strongly dentate, venation conspicuous. Capsule cylindrical. Calyx tube 25 mm long. Flowers not more than 40 mm in diameter; yellow, not fading red.
Biennial herb, 0.3-2.0 m high. Stems erect; pubescent with short appressed hairs and longer curved or spreading hairs, some arising from red papillae. Leaves sessile or petioles very short; blade narrowly ovate, 80-170 x 20-50 mm, margins strongly dentate, venation prominent. Flowers: floral tube 25-40 mm long; calyx with tube 25 mm long, sepals 8-25 mm long; petals 7-25 mm long, yellow, not fading red; Jan.-Mar. Fruit cylindrical, 14-40 mm long.
North America: Alta. to Wisc, and Mich., s. to Tex. and La. and e. to Atl. Coast; the species as a whole ranges to Nfld., Que. and Ont.
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