Flora of North America species comparison

unbranched, (0.05–)0.2–0.8(–1.5) dm, pubescent throughout, trichomes simple and 2-rayed, 0.4–1 mm, with 3–5-rayed ones, 0.05–0.4 mm, (sometimes trichomes mostly simple).

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).

rosulate; petiolate;

petiole base and margin ciliate, (trichomes often course, simple, 0.4–1.3 mm);

blade oblanceolate to obovate, 0.6–1.8 cm × 1.5–5 mm, margins entire, surfaces pubescent, abaxially with stalked, 2–6-rayed trichomes, 0.2–0.6 mm, adaxially with primarily simple and stalked, 2-rayed trichomes, to 1.1 mm, with 3–5-rayed ones, 0.2–0.4 mm.

(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.

2–9(–12)-flowered, ebracteate, (corymbose), 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 (grayish green), broadly ovate, 2.2–3 mm, pubescent, (trichomes simple, to 1 mm, sometimes with stalked, smaller, 2–4-rayed ones);

petals (broadly patent), yellow, obovate, 4–6 × 3–5 mm;

anthers ovate, 0.3–0.4 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-ascending, straight or slightly curved upward, 4–11(–16) mm, pubescent, trichomes simple and 2–4-rayed.

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

oblong or ovate, plane, flattened, 6–12 × 3.5–5.5 mm;

valves pubescent or puberulent, trichomes simple, 0.1–0.4 mm, (sometimes with short-stalked, 2- or 3-rayed ones);

ovules 12–24 per ovary;

style 0.6–1 mm (stigma distinctly wider than style).

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.

(brown), ovoid, 1–1.3 × 0.6–0.9 mm.

oblong, 1–1.2 × 0.6–0.8 mm.

= 128, 144.