Flora of North America species comparison

0–20 mm.

20–40 mm.

20–150(–400) × 10–120(–170) mm;

petiole to 200 mm;

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

30–200 × 3–7 mm;

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

50–250(–500) mm, surpassing leaves or not, glabrous or hirsute.

100–500 mm, hairy, hairs antrorse, long and short.

brownish or greenish, (20–)50–300(–400) mm, densely flowered;

bracts lanceolate, 0.5–1 mm, length 0.3–0.7 times sepals.

greenish or brownish, 80–150 mm, densely flowered, flowers in whorls or pairs;

bracts almost linear, 15–30 mm, length 2–12 times sepals.

sepals 1.5–2 mm;

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

stamens 4.

sepals 2.7–3.7 mm;

corolla bilaterally symmetric, lobes reflexed, adaxials 1.4–2.3 mm, laterals symmetric, base deeply cordate;

stamens 4, connective elongated, apex acute.

(2–)4–5 mm, dehiscing at middle.

5–35, 0.5–1 mm.

2, 2.5–2.9 mm.

= 12.

= 20.