Flora of North America species comparison

0–10 mm.

0–30 mm, often branched.

50–120 × 1–4 mm;

blade linear, margins entire or toothed, veins conspicuous or not, surfaces villous or lanate, rarely glabrate.

10–230 × 0.5–12 mm;

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

200–1500 mm, hairy, hairs antrorse, long and short.

10–400 mm, hairy, hairs woolly, long.

greenish or brownish, 70–150 mm, densely flowered, flowers in whorls or pairs;

bracts ovate, 1–2 mm, length 0.3–0.8 times sepals.

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 2.5–3.4 mm;

corolla radially symmetric, lobes reflexed, 2–2.7 mm, base obtuse or slightly cordate;

stamens 4, connective elongated, apex acute.

sepals 1.9–3.5 mm;

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

stamens 4.

2, 2.1–2.9 mm.

2, 2–2.6 mm.

= 20.

= 8.