Flora of North America species comparison

20–40 mm.

10–40 mm.

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.

60–160 × 3–5 mm;

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

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

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

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

bracts almost linear, 15–30 mm, length 2–12 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 2.7–3.7 mm;

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

stamens 4, connective elongated, apex acute.

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, 2.5–2.9 mm.

2, 2.8–3.2 mm.

= 20.

= 20.