Flora of North America species comparison

unbranched or branched distally, (0.6–)1–3(–3.8) dm, pubescent throughout, trichomes simple, 0.5–1mm, with 4–10-rayed ones, 0.05–0.2 mm (mostly branched on basal parts).

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.

rosulate; petiolate;

petiole ciliate throughout;

blade linear to oblanceolate or oblong, (0.5–)0.8–2(–3.5) cm × 1.5–4(–11) mm, margins entire or dentate, (base and apex ciliate, trichomes simple, 0.3–0.8 mm), surfaces pubescent with short-stalked, 4–12-rayed trichomes, 0.1–0.3 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.

3–10(–17), (not overlapping);

sessile;

blade lanceolate to ovate or oblong, margins entire or dentate, surfaces pubescent as basal (adaxially with simple and forked trichomes near blade base).

usually 1–5;

sessile or subsessile;

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

(10–)15–47(–63)-flowered, basally bracteate, often considerably elongated in fruit;

rachis not flexuous, densely pubescent, trichomes 4–10-rayed (0.05–0.2 mm), and fewer simple ones.

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

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

sepals (green or lavender), oblong to ovate, 1.5–2 mm, pubescent, (trichomes simple and few-rayed);

petals white, oblanceolate to spatulate, 2.3–3.7(–4.5) × 0.7–1.7 mm;

anthers ovate, 0.1–0.2 mm.

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.

suberect or ascending, straight, 2–5(–10) mm, pubescent as rachis.

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

(subappressed to rachis), linear-lanceolate to linear or, rarely, ovate-oblong, slightly twisted or plane, flattened, (5–)6–11 × 1.5–2(–2.5) mm;

valves pubescent, trichomes short-stalked, 3–7-rayed, 0.05–0.3 mm;

ovules 28–48 per ovary;

style 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.

ovoid, 0.5–0.7(–0.9) × 0.3–0.5 mm.

oblong, 1.1–1.5 × 0.7–0.9 mm.

= 32.

= 20.