Flora of North America species comparison

0–10 mm.

0–15 mm.

60–290 × 7–30 mm;

blade obovate or elliptic, margins toothed, veins conspicuous, surfaces pilose.

(25–)50–120 × 1–4 mm;

blade linear, margins entire, rarely toothed, veins conspicuous or not, surfaces villous.

15–150 mm, hairy, hairs patent, long.

(10–)40–240(–260) mm, hairy, hairs antrorse, long and short and patent, long.

greenish, yellowish, or brownish, 35–300 mm, densely or loosely flowered;

bracts narrowly triangular or triangular, 2.5–3.2 mm, length 0.7–1.1 times sepals.

grayish or brownish, 40–120 mm, densely flowered, flowers in whorls or pairs;

bracts triangular or narrowly ovate, 2–10 mm, length 1–2 times sepals, apex acute or acuminate.

sepals asymmetric, 2.7–3.6 mm, apex acuminate;

corolla radially symmetric, lobes erect, forming a beak, 2–3.1 mm, base obtuse;

stamens 4.

sepals 2.2–4.8 mm;

corolla bilaterally symmetric, lobes reflexed, 1.6–2.1 mm, base cordate;

stamens 4, connective usually elongated, apex acute.

2, dark red, 2.3–2.8 mm, adaxial face concave.

2, 2.2–2.6 mm.

= 24.

= 20.