Flora of North America species comparison

pubescent and hirsute, often glabrescent, hairs stiff.

ascending, 30–100(–150) cm, pubescent, hirsute, glabrescent, puberulent, sparsely hispid, or downy.

puberulent and often hirsute;

proximal 10–40 mm, margins 3-lobed, lobes 1–3 mm wide;

distal 10–30 × 0.5–1.5 mm, margins entire or 3-lobed.

capitate spikes, 2–15-flowered;

bracts 5–10, 5–20 mm, margins entire or 3-lobed, lobes purplish black, ivory, or green distally, linear-lanceolate to linear or slightly spatulate.

5–15-flowered;

proximal bracts 15–20 mm, longer than flowers, midlobes green or red distally, linear-lanceolate, 1–1.5 mm wide, apex rounded to retuse.

bracteoles 14–20 mm, margins entire or toothed.

corolla 12–20 mm.

calyx 10–20 mm, tube 1–2 mm, apex entire or 2-fid, cleft 0–1 mm;

corolla pale yellow with purple veins and an abaxial, U-shaped, purple mark, 8–20 mm, throat 5–10 mm diam., abaxial lip 6–10 mm, ca. equal to and appressed to adaxial;

stamens 4, filaments hairy, fertile pollen sacs 2 per filament, subequal.

oblong-ovoid, 8–12 mm.

10–25, dark brown, oblong-ovoid, 1.5–2 mm, striate.

= 28.