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).

usually branched, (0.6–)1.2–2.8(–3.6) dm, pubescent proximally, glabrous distally, trichomes simple, 0.3–1.3 mm, and 2–4-rayed, 0.1–0.6 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.

rosulate;

petiole (0–2 cm), densely pubescent, (trichomes simple and 2–4-rayed, not ciliate);

blade spatulate to obovate or oblanceolate, (1.5–)3–8(–10) cm × 7–25(–33) mm, margins dentate to denticulate, surfaces pubescent with long-stalked, cruciform, and fewer 2- or 3-rayed trichomes, 0.1–0.6 mm.

0.

1–3;

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.

12–40(–51)-flowered, ebracteate, elongated in fruit;

rachis not flexuous, usually glabrous, rarely proximally with relatively few trichomes.

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, 2.5–3.5 mm, sparsely pubescent, (trichomes simple and 2–4-rayed);

petals yellow, spatulate, (5–)6–8.5 × 2.2–3.5 mm;

anthers oblong, 0.7–0.9 mm.

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

horizontal to divaricate, straight, (6–)9–18(–22) mm, usually glabrous, rarely sparsely pubescent as stem proximally.

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).

linear-elliptic to elliptic-lanceolate, slightly twisted, flattened, 6–19 × 2.5–3.5 mm;

valves glabrous or pubescent, trichomes simple and short-stalked, 2(–4)-rayed, 0.07–0.3 mm;

ovules 24–36 per ovary;

style (0.8–)1–2.2 mm.

(brown), ovoid, 1–1.3 × 0.6–0.9 mm.

oblong, 1–1.4 × 0.7–0.8 mm.

= 128, 144.

= 22.