Flora of North America species comparison

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

sparsely puberulent and/or glandular-puberulent and, often, pilose.

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.

yellow-green, entire or 3-lobed, lobes linear to linear-lanceolate.

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.

4–6-flowered;

bracts yellow-green, 3-lobed or entire, sparsely pilose with long hairs.

bracteoles 10–20 mm, margins entire or toothed.

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.

corolla 10–15 mm.

narrowly ovoid, 5–10 mm.

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

= 28.