Flora of North America species comparison

100–350 mm, freely branched.

0–20 mm.

cauline, opposite, 60–80 × 1–3 mm;

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

20–150 × 10–120 mm;

petiole to 200 mm;

blade ovate to cordate-ovate, margins entire or toothed, veins conspicuous, surfaces glabrous or hirsute.

100–650 mm, hairy.

50–250 mm, glabrous or hirsute.

greenish or brownish, (50–)150–250 mm, densely flowered, eglandular;

bracts proximal strongly differing from distal, ovate, 2–5(–7) mm, length 1–1.5 times sepals, proximal bracts: apex acute.

brownish or greenish, 50–300 mm, densely or loosely flowered;

bracts narrowly lanceolate, 2 mm, length 1–1.2 times sepals.

sepals 2–3 mm;

corolla radially symmetric, lobes reflexed, 2–4 mm, base obtuse;

stamens 4.

sepals 1.5–2 mm;

corolla radially symmetric, lobes reflexed, 0.5–1 mm, base obtuse;

stamens 4.

4–6(–8) mm, dehiscing proximal to middle.

2, 2–2.5 mm.

4 or 5(–8), 1.5–2 mm.

= 12.

= 24.