Flora of North America species comparison

0–12 mm.

0–10 mm.

50–130 × 3–7 mm;

blade linear, margins entire, veins conspicuous or not, surfaces villous, adaxial rarely glabrous.

60–360 × 15–65 mm;

blade elliptic to narrowly elliptic, margins toothed, veins conspicuous, surfaces pilose, rarely glabrate, adaxial surface hairs not floccose, less than 2 mm long, more than 0.03 mm wide.

80–250 mm, hairy, hairs patent, long and antrorse, short.

55–360 mm, hairy, hairs antrorse, long.

greenish, whitish, or brownish, 50–120 mm, densely flowered, flowers in whorls or pairs;

bracts triangular, 2.5–8 mm, length 0.6–2.2 times sepals.

greenish or brownish, 110–720 mm, densely or loosely flowered;

bracts ovate, rarely triangular, 2.5–4 mm, length 0.8–1.3 times sepals.

sepals 3.5–4 mm;

corolla radially symmetric, lobes reflexed, 3–3.6 mm, base slightly cordate;

stamens 4, connective elongated, apex acute.

sepals 2.6–3.1 mm;

corolla radially symmetric, lobes erect, forming a beak, 2.4–2.7 mm, base obtuse;

stamens 4.

2, 3.2–3.8 mm.

3, 1.8–2.5 mm.

= 20.

= 48.