Flora of North America species comparison

0–30 mm, often branched.

20–40 mm.

10–230 × 0.5–12 mm;

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

30–200 × 3–7 mm;

blade linear or narrowly lanceolate, margins entire, rarely toothed, veins conspicuous or not, abaxial surface villous, adaxial glabrous or sparsely villous.

10–400 mm, hairy, hairs woolly, long.

100–500 mm, hairy, hairs antrorse, long and short.

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.

greenish or brownish, 80–150 mm, densely flowered, flowers in whorls or pairs;

bracts almost linear, 15–30 mm, length 2–12 times sepals.

sepals 1.9–3.5 mm;

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

stamens 4.

sepals 2.7–3.7 mm;

corolla bilaterally symmetric, lobes reflexed, adaxials 1.4–2.3 mm, laterals symmetric, base deeply cordate;

stamens 4, connective elongated, apex acute.

2, 2–2.6 mm.

2, 2.5–2.9 mm.

= 8.

= 20.