Flora of North America species comparison

0–10 mm.

100–350 mm, freely branched.

50–120 × 1–4 mm;

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

cauline, opposite, 30–60 × 1–4 mm;

blade linear to linear-lanceolate, margins entire or slightly toothed, veins conspicuous or not, surfaces hairy.

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

30–50 mm, hairy.

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.

greenish or brownish, 40–65 mm, densely flowered, glandular-hairy;

bracts all similar, ovate, 3–5 mm, lengths 1–1.5 times sepals.

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 3–3.5 mm;

corolla radially symmetric, lobes reflexed, 2–3 mm, base obtuse;

stamens 4.

lanceoloid.

2, 2.1–2.9 mm.

2, 2–3 mm.

= 20.

= 12.