Flora of North America species comparison

100–400 mm, freely branched.

0–15 mm.

cauline, opposite, 30–60 × 0.75–1 mm;

blade linear to linear-lanceolate, margins entire, veins inconspicuous, surfaces hairy.

(25–)50–120 × 1–4 mm;

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

30–80 mm, hairy.

(10–)40–240(–260) mm, hairy, hairs antrorse, long and short and patent, long.

greenish or brownish, 40–85 mm, densely flowered;

bracts broadly ovate, 5–6 mm, lengths equal to sepals.

grayish or brownish, 40–120 mm, densely flowered, flowers in whorls or pairs;

bracts triangular or narrowly ovate, 2–10 mm, length 1–2 times sepals, apex acute or acuminate.

sepals 5–6 mm;

corolla radially symmetric, lobes reflexed, 3–3.5 mm, base obtuse;

stamens 4.

sepals 2.2–4.8 mm;

corolla bilaterally symmetric, lobes reflexed, 1.6–2.1 mm, base cordate;

stamens 4, connective usually elongated, apex acute.

1 or 2, 2 mm.

2, 2.2–2.6 mm.

= 12.

= 20.