Flora of North America species comparison

erect or ascending, rarely decumbent, not fleshy, hairy or glabrous.

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

cauline, alternate;

petiole absent;

blade not fleshy, not leathery, margins entire or 3–7-lobed.

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.

terminal, spikes or flowers solitary, often capitate;

bracts present.

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.

absent;

bracteoles absent.

bracteoles 14–20 mm, margins entire or toothed.

sepals 2, calyx bilaterally symmetric, spathelike, lobes triangular;

petals 5, corolla yellow, yellow-green, purple, pink, or red, strongly bilabiate, club-shaped, abaxial lobes 3, middle lobe tightly revolute, tip distinctly folded inside-out, adaxial 2, adaxial lip galeate, rounded at apex, opening downward;

stamens (2 or)4, didynamous, filaments hairy or glabrous;

staminode 0;

ovary 2-locular, placentation axile;

stigma slightly expanded at apex.

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.

dehiscence loculicidal.

oblong-ovoid, 8–12 mm.

4–25, pale brown to dark brown, ovoid to reniform, wings absent.

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

= 6, 7.

= 28.