Flora of North America species comparison

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

erect to ascending, 20–80(–120) cm, glabrous or sparsely glandular-puberulent, puberulent, and/or pilose.

cauline, alternate;

petiole absent;

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

puberulent, often pilose, or glabrous;

proximal 20–60 mm, margins entire or 3-lobed, lobes 0.5–1 mm wide;

distal 10–40 × 0.3–2 mm, margins entire.

terminal, spikes or flowers solitary, often capitate;

bracts present.

spikes, 2–7-flowered, or flowers solitary;

bracts 1–4, 5–20 mm, margins entire or 3-lobed, lobes green or purple distally, narrowly lanceolate to linear-lanceolate, apex rounded.

absent;

bracteoles absent.

bracteoles 10–20 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 0 mm, apex 2-fid, cleft 1 mm;

corolla pale yellow, marked with purple along veins and galea, 10–20 mm, throat 6–8 mm diam., abaxial lip 4–6 mm, ca. equal to and appressed to adaxial;

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

dehiscence loculicidal.

narrowly ovoid, 5–10 mm.

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

6–16, dark brown, ovoid to rhomboid, 1.5–2.5 mm, striate.

= 6, 7.