Flora of North America species comparison

0–20 mm.

10–40 mm.

100–300 × 80–200 mm;

petiole to 300 mm;

blade broadly oval to cordate-ovate, margins entire, veins conspicuous, laterals branching from midvein distal to base, surfaces glabrous.

60–160 × 3–5 mm;

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

200–300 mm, glabrous.

800–1600 mm, hairy, hairs antrorse, long and short.

brownish or greenish, 100–500 mm, loosely flowered, rachis visible between flowers;

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

greenish or brownish, (20–)150–250 mm, densely flowered, flowers in whorls or pairs;

bracts ovate or triangular, 1–3.5 mm, length 0.4–0.8 times sepals.

sepals 2–2.5 mm;

corolla radially symmetric, lobes spreading, 2–2.5 mm, base obtuse;

stamens 4.

sepals 3–4 mm;

corolla bilaterally symmetric, lobes reflexed, adaxials 2.4–3 mm, laterals asymmetric, base cordate;

stamens 4, connective elongated, apex acute.

2–4, 2.5–3.5 mm.

2, 2.8–3.2 mm.

= 24.

= 20.