Flora of North America species comparison

usually branched, 1.1–3.4 dm, hirsute proximally, trichomes mostly simple and 2-rayed, 0.2–1.5 mm, pubescent distally, trichomes mostly 2- or 3-rayed, 0.2–1 mm.

unbranched, 0.05–0.3 dm, densely pubescent throughout, trichomes simple, 0.4–1.3 mm, and stalked, 2–5-rayed, stellate, 0.1–0.6 mm.

rosulate;

petiole (obscure), ciliate, (trichomes simple and 2-rayed);

blade obovate to oblanceolate, 1.6–2.5 cm × 5–10 mm, margins usually entire, rarely denticulate, surfaces pubescent, abaxially with stalked, mostly cruciform trichomes, 0.5–1 mm, adaxially with simple and stalked, 2–4-rayed ones.

(imbricate); rosulate;

sessile;

blade linear to linear-oblanceolate, 0.4–1.2 cm × 0.8–1.5 mm, margins entire, (ciliate, trichomes simple and spurred, (0.4–)0.6–1.4 mm), surfaces pubescent, abaxially (dense) with stalked, 2–12-rayed trichomes, 0.1–0.8 mm, adaxially with simple and 2-rayed ones, 0.3–1 mm, (midvein prominent).

usually 1–5;

sessile or subsessile;

blade oblanceolate to oblong, margins often denticulate, (ciliate proximally, with 2- or 3-rayed trichomes).

0.

9–25-flowered, ebracteate, elongated in fruit;

rachis not flexuous, pubescent, trichomes 2- or 3-rayed.

2–7-flowered, ebracteate, slightly elongated in fruit;

rachis not flexuous, pubescent as stem.

sepals oblong-obovate, 2–3.5 mm, pubescent, (trichomes short- to long-stalked, 2–4-rayed, 0.2–0.8 mm);

petals yellow (often fading whitish), oblanceolate, 3–5 × 1–1.5 mm;

anthers ovate, 0.4–0.5 mm.

sepals oblong, 2.8–3.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);

petals pale yellow, oblanceolate to spatulate, (4–)5–6 × (1.5–)2–3 mm;

anthers oblong, 0.5–0.7 mm.

horizontal to divaricate-ascending, usually straight, rarely curved upward, 7–10 mm, pubescent, trichomes 2- or 3-rayed.

divaricate-ascending, straight, 3–9 mm, pubescent, trichomes simple (0.4–1.4 mm), and stalked, 2–5-rayed (0.1–0.6 mm).

narrowly elliptic to slightly falcate, plane, flattened, (7–)10–16 × (2–)2.5–3.7 mm;

valves pubescent, trichomes short-stalked, 2–4-rayed, 0.2–0.5 mm;

ovules 14–22 per ovary;

style 0.9–1.2 mm.

often broadly ovoid to lanceolate, plane, slightly inflated basally, (5–)6–9 × (3–)3.7–5 mm;

valves densely pubescent, trichomes simple and 2-rayed, (0.2–)0.4–1 mm, (occasionally with fewer, smaller, 4- or 5-rayed ones);

ovules 8–12 per ovary;

style (0.6–)0.8–1.2 mm.

oblong, 1.1–1.5 × 0.7–0.9 mm.

oblong, 1.7–2.2 × 1–1.4 mm.

= 20.