Flora of North America species comparison

100–350 mm, freely branched.

0–10 mm.

cauline, opposite, 30–60 × 1–4 mm;

blade linear to linear-lanceolate, margins entire or slightly toothed, veins conspicuous or not, surfaces hairy.

20–80(–115) × 5–15 mm;

blade lanceolate, margins usually 1- or 2-pinnatifid, veins conspicuous or not, surfaces villous, hairs septate, sometimes glabrate.

30–50 mm, hairy.

decumbent, sometimes erect, 15–150(–210) mm, villous.

greenish or brownish, 40–65 mm, densely flowered, glandular-hairy;

bracts all similar, ovate, 3–5 mm, lengths 1–1.5 times sepals.

decumbent, sometimes erect, greenish, purplish, or brownish, (15–)30–300 mm, densely flowered;

bracts ovate to lanceolate, 1.5–2 mm, length 0.5–0.6 times sepals.

sepals 3–3.5 mm;

corolla radially symmetric, lobes reflexed, 2–3 mm, base obtuse;

stamens 4.

sepals 2–3 mm;

corolla radially symmetric, tube hairy, lobes reflexed, 1 mm, base obtuse;

stamens 4.

lanceoloid.

2, 2–3 mm.

(2–)4 (plus 1 smaller, distal one of different shape), 1–1.5 mm.

= 12.

= 10, 20, 30 (all Eurasia).