Flora of North America species comparison

unbranched, (0.05–)0.1–0.8 dm, pubescent throughout, sometimes sparsely so distally, trichomes simple, 0.3–0.7 mm, and 2–4-rayed, 0.05–0.2 mm.

branched, (0.3–) 0.4–1.7(–2.5) dm, pubescent throughout, trichomes simple and long-stalked, 2-rayed, 0.4–1.4 mm, with smaller, 2–4-rayed ones, 0.1–0.6 mm, (simple ones usually fewer distally).

(not imbricate); rosulate;

petiolate;

petiole ciliate, (trichomes simple and 2-rayed, 0.4–1.3 mm);

blade oblanceolate, 0.5–1.1 cm × 1.5–4 mm, margins entire, (pubescent as petiole, apex acute to subacute, trichomes simple and/or branched), surfaces pubescent, abaxially with simple trichomes, to 1 mm, and stalked, 2–4-rayed ones, 0.1–0.5 mm, adaxially with simple trichomes, 0.4–1 mm, (sometimes glabrous).

(densely imbricate); rosulate; shortly petiolate;

petiole base and margin ciliate, (trichomes simple, 0.6–2 mm);

blade oblong to narrowly oblanceolate, (0.5–)1–2.2(–4.5) cm × 2–5 mm, margins entire, surfaces densely pubescent, abaxially with stalked, 2–4-rayed trichomes, 0.4–1.2 mm, (simple trichomes often along midvein), adaxially with mostly simple and long-stalked, 2-rayed trichomes, 0.6–1.3 mm, sometimes with 3- or 4-rayed ones.

0.

(4–)6–10(–13);

sessile;

blade oblong to ovate, margins entire, surfaces pubescent as basal.

2–8-flowered (congested), ebracteate, slightly elongated in fruit;

rachis not flexuous, pubescent as stem.

(10–)18–55(–67)-flowered, ebracteate or proximalmost flowers bracteate, slightly or considerably elongated in fruit;

rachis not flexuous, pubescent as stem.

sepals ovate, 1.8–2.3 mm, pubescent, (trichomes simple with fewer, short-stalked ones);

petals pale yellow, narrowly spatulate to oblanceolate, 2.5–3 × 0.8–1.5 mm;

anthers ovate, 0.2–0.3 mm.

sepals oblong, 2–2.7 mm, pubescent, (trichomes short-stalked, 2–4-rayed);

petals yellow, linear, 2–3.5 × 0.2–0.5 mm;

anthers oblong, 0.6–0.8 mm (exserted).

divaricate to ascending, straight or slightly curved upward, 1.5–4 mm, pubescent as stem or trichomes branched.

divaricate to ascending, straight, 2–6(–8) mm, pubescent as stem.

often obovate, plane, slightly flattened, 5–10 × (3–)3.5–5 mm;

valves glabrate or sparsely pubescent, 0.05–0.2 mm;

ovules 8–16(–20) per ovary;

style 0.05–0.15 mm.

elliptic to oblong or linear- to oblong-elliptic, slightly twisted or plane, flattened, 5–13(–17) × 2–3(–4) mm;

valves pubescent, trichomes short-stalked, cruciform, 0.1–0.5 mm, (sometimes with 2- or 3-rayed ones);

ovules 16–28 per ovary;

style 1.4–3.4 mm.

ovoid, 1.1–1.6 × 0.7–1 mm.

oblong, 1–1.2 × 0.6–0.8 mm.

= 32.