Flora of North America species comparison

0–5 mm.

20–40 mm.

20–70 × 1–2 mm;

blade linear, margins entire, sometimes toothed, veins conspicuous or not, surfaces hairy or glabrous.

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.

15–60 mm, hairy, sometimes glabrous.

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

greenish or brownish, 20–100 mm, loosely or densely flowered;

bracts triangular-ovate, 1.5–2 mm, length 0.9–1.1 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 erect, forming a beak, 0.5 mm, base obtuse;

stamens 2.

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.

4, 0.8–1.3 mm.

2, 2.5–2.9 mm.

= 12.

= 20.