Flora of North America species comparison

0–20 mm.

100–400 mm, freely branched.

40–200 × 10–30 mm;

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

cauline, opposite, 30–60 × 0.75–1 mm;

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

25–200 mm, slightly surpassing leaves, glabrous.

30–80 mm, hairy.

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.

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

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

sepals 2–2.5 mm;

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

stamens 4.

sepals 5–6 mm;

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

stamens 4.

3 or 4, 2–2.3 mm.

1 or 2, 2 mm.

= 24.

= 12.