Flora of North America species comparison

0–12 mm.

0–20 mm.

50–130 × 3–7 mm;

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

40–200 × 10–30 mm;

blade lanceolate-spatulate to narrowly ovate, margins entire, sometimes toothed, veins conspicuous, surfaces usually glabrous.

80–250 mm, hairy, hairs patent, long and antrorse, short.

25–200 mm, slightly surpassing leaves, glabrous.

greenish, whitish, or brownish, 50–120 mm, densely flowered, flowers in whorls or pairs;

bracts triangular, 2.5–8 mm, length 0.6–2.2 times sepals.

brownish or greenish, 45–250 mm, densely flowered, rachis not clearly visible between flowers;

bracts broadly ovate, 2 mm, length 0.8–1 times sepals.

sepals 3.5–4 mm;

corolla radially symmetric, lobes reflexed, 3–3.6 mm, base slightly cordate;

stamens 4, connective elongated, apex acute.

sepals 2–2.5 mm;

corolla radially symmetric, lobes spreading, 1 mm, base obtuse;

stamens 4.

2, 3.2–3.8 mm.

3 or 4, 2–2.3 mm.

= 20.

= 24.