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).

unbranched, (0.4–)0.6–1.5(–2.7) dm, pubescent throughout, trichomes simple, 0.5–1.5 mm, and 2–4-rayed ones, 0.05–0.3 mm, (sometimes 2–4-rayed ones 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.

rosulate;

subsessile or shortly petiolate;

petiole ciliate throughout;

blade oblanceolate to spatulate or obovate, (0.6–)0.8–4.5(–6) cm × 2–12(–16) mm, margins usually entire, rarely obscurely dentate, (not ciliate), surfaces abaxially pubescent with stalked, (2–)4-rayed trichomes, 0.2–1 mm, adaxially with stalked, 2–4-rayed trichomes, 0.3–0.8 mm, and simple ones, 0.5–1.9 mm.

0.

0.

2–9(–12)-flowered, ebracteate, (corymbose), slightly elongated in fruit;

rachis not flexuous, pubescent as stem.

(15–)30–75-flowered, ebracteate, elongated in fruit;

rachis not flexuous, pubescent, trichomes 2–4-rayed, sometimes with simple ones.

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 broadly ovate, 1.8–3.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);

petals pale yellow, oblanceolate, 4–7 × 1.5–2.5 mm;

anthers ovate to oblong, 0.4–0.7 mm.

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

horizontal to divaricate-ascending, straight, 3–11(–16) mm, pubescent, trichomes 2–4-rayed, sometimes with simple ones.

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).

ovoid-ellipsoid to oblong, plane, inflated basally, 3–8 × 1.8–3.5 mm;

valves hirsute, trichomes simple and spurred, (0.2–)0.3–1 mm, or puberulent, trichomes short-stalked, 2–4-rayed, 0.1–0.2 mm;

ovules 8–12(–18) per ovary;

style 0.6–2(–2.5) mm.

(brown), ovoid, 1–1.3 × 0.6–0.9 mm.

oblong, 0.9–1.2 × 0.6–0.8 mm.

= 128, 144.

= 30.