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, (0.3–)0.8–2.3(–3) dm, pubescent proximally, glabrous or sparsely pubescent distally, trichomes simple and 2–4-rayed, 0.07–0.4 mm.

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.

(loosely) rosulate; petiolate;

petiole base ciliate, margin not ciliate, (midvein obscure, trichomes simple and 2-rayed, 0.2–0.7 mm);

blade oblanceolate to lanceolate, (0.3–)0.6–2.5(–3.5) cm × (1–)2–7(–10) mm, margins entire or denticulate, surfaces pubescent, abaxially with stalked, cruciform trichomes, 0.2–0.5 mm, adaxially with cruciform and/or simple and 2-rayed ones.

0.

0–2 (or 3);

sessile;

blade elliptic to ovate or lanceolate, margins usually entire, rarely denticulate, surfaces pubescent as basal adaxially or trichomes predominantly simple.

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

rachis not flexuous, pubescent as stem.

(2–)4–13(–18)-flowered, ebracteate, elongated in fruit;

rachis not flexuous, glabrous or sparsely 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 ovate, 2.2–3 mm, glabrous or pubescent subapically, (trichomes simple and short-stalked, 2-rayed);

petals pale yellow to creamy white, spatulate, 3–5 × 1.5–2.5 mm;

anthers ovate, 0.4–0.5 mm.

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

divaricate-ascending or ascending, straight or often curved upward (not expanded basally), (3–)5–17(–22) mm, usually glabrous, rarely pubescent, trichomes simple and stalked, 2–4-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 to oblong or linear-lanceolate, plane (not curved), flattened, 5–11(14) × 2–3 mm;

valves usually glabrous, rarely margin pubescent, trichomes simple;

ovules 16–30 per ovary;

style 0.2–0.7 mm.

(brown), ovoid, 1–1.3 × 0.6–0.9 mm.

oblong, 0.7–1.2(–1.5) × 0.4–0.7(–0.8) mm.

= 128, 144.

= 64.