Flora of North America species comparison

0–10 mm.

0–40 mm, usually branched.

50–120 × 1–4 mm;

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

10–220 × (1–)10–15 mm;

blade linear to lanceolate, margins entire or toothed, veins not conspicuous, surfaces glabrous, sometimes hairy.

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

40–120 mm, glabrous or hirsute.

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, (15–)50–200(–290) mm, densely or loosely flowered;

bracts broadly ovate, 1.5–4(–6) mm, length 0.8–1.2 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 1.5–3.5 mm;

corolla radially symmetric, tube hairy, lobes reflexed, 1–1.5 mm, base obtuse;

stamens 4.

2, 2.1–2.9 mm.

1–3, 1.5–3 mm.

= 20.

= 24.