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 or unbranched, 1–3.9 dm, pubescent throughout or proximally, trichomes simple, 0.3–1.4 mm, often with smaller, 2 (or 3)-rayed ones.

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.

(soon withered); rosulate; petiolate;

petiole ciliate, (trichomes simple, 0.4–1.1 mm);

blade oblanceolate to spatulate, 1–7 cm × 2–12(–26) mm, margins entire or dentate (pubescent as petiole), surfaces pubescent, abaxially with simple trichomes, 0.6–1.1 mm, and stalked, 2- (or 3-)rayed ones, often smaller, adaxially with subsetiform, simple trichomes, 0.5–1.2 mm (rarely with fewer, stalked, 2-rayed ones).

0.

(2–)6–15;

sessile;

blade lanceolate to ovate or oblong, margins dentate, surfaces pubescent as basal.

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

rachis not flexuous, pubescent as stem.

10–51-flowered, ebracteate, elongated in fruit;

rachis glabrous or pubescent as stem, not flexuous.

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 ovate, 2.5–3.2 mm, pubescent, (trichomes simple and short-stalked, 2-rayed);

petals yellow, oblanceolate, 4.5–6.5 × 1.5–2 mm;

anthers oblong, 0.8–1.1 mm.

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

horizontal to divaricate, straight, 4–15 mm, glabrous or pubescent, trichomes simple and 2-rayed.

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-lanceolate, twisted (1 turn or plane), flattened, 6–10 × 2–2.5 mm;

valves glabrous or sparsely puberulent, trichomes simple, 0.05–0.15 mm;

ovules 14–20 per ovary;

style (1–)2–3 mm.

(brown), ovoid, 1–1.3 × 0.6–0.9 mm.

oblong, 1.1–1.4 × 0.7–0.9 mm.

= 128, 144.