Flora of North America species comparison

0–20 mm.

10–40 mm.

prostrate, sometimes ascending, 40–200 × 30–70 mm;

blade elliptic to ovate, margins entire or toothed, veins conspicuous, surfaces hairy, hairs 0.5 mm.

60–160 × 3–5 mm;

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

80–300 mm, not groove-angled, hirsute.

800–1600 mm, hairy, hairs antrorse, long and short.

grayish or whitish, 100–400 mm, densely flowered, shiny;

corolla lobes of neighboring flowers overlapping;

bracts ovate, 1.8–2 mm, length 0.9–1 times sepals.

greenish or brownish, (20–)150–250 mm, densely flowered, flowers in whorls or pairs;

bracts ovate or triangular, 1–3.5 mm, length 0.4–0.8 times sepals.

sepals 2 mm, adaxial 2 nearly distinct;

corolla radially symmetric, lobes reflexed, 1.5 mm, base obtuse;

stamens 4.

sepals 3–4 mm;

corolla bilaterally symmetric, lobes reflexed, adaxials 2.4–3 mm, laterals asymmetric, base cordate;

stamens 4, connective elongated, apex acute.

2–4, 2 mm.

2, 2.8–3.2 mm.

= 12, 24.

= 20.