Flora of North America species comparison

0–10 mm.

0–30 mm, often branched.

60–120 × 4–10 mm;

blade linear, margins toothed (teeth to 4 mm), rarely entire, veins conspicuous or not, surfaces villous or sericeous.

10–230 × 0.5–12 mm;

blade linear or narrowly elliptic, margins toothed, veins conspicuous or not, surfaces villous or lanate to sericeous.

280–580 mm, hairy, hairs antrorse, long and short.

10–400 mm, hairy, hairs woolly, long.

greenish or brownish, 50–180 mm, densely flowered, flowers in whorls or pairs;

bracts ovate or triangular, 1.5–6 mm, length 0.6–1.4 times sepals, apex acute or acuminate.

grayish or brownish, 20–400 mm, densely flowered, flowers in spirals;

bracts ovate or elliptic, 1.7–4 mm, length 0.8–1.2 times sepals, apex not reached by green nerve.

sepals 2.5–4 mm;

corolla bilaterally symmetric, abaxial and lateral lobes reflexed, adaxial erect, 2.2–2.5 mm, base slightly cordate;

stamens 4, connective significantly elongated, apex acute.

sepals 1.9–3.5 mm;

corolla radially symmetric, lobes reflexed, 1.3–2.8 mm, base cuneate;

stamens 4.

2, 2.4–3.4 mm.

2, 2–2.6 mm.

= 20.

= 8.