Flora of North America species comparison

sometimes branched distally, (0.5–) 1–3.5(–5.2) dm, pubescent throughout, trichomes simple (non-crisped), 0.4–1.3 mm, and 3–6-rayed ones, 0.1–0.5 mm.

(simple or few from, or distal to, base), unbranched, (0.1–)0.3–1.2(–1.6) dm, sparsely to densely pubescent proximally, trichomes 2 (or 3)-rayed, 0.1–0.6 mm, sometimes with simple or spurred ones, to 0.9 mm, distally usually glabrous, rarely with few trichomes.

rosulate; petiolate;

petiole (distinct or obscure) ciliate, (trichomes simple, to 0.8 mm);

blade oblanceolate to obovate, (0.4–)1–3.7(–5) cm × (1–)2–7(–10) mm, margins entire or denticulate, surfaces pubescent, trichomes stalked, (2–)4–7 (or 8)-rayed, 0.2–0.5(–0.6) mm.

not rosulate;

petiole obscure;

blade elliptic or spatulate to obovate or suborbicular, 0.5–2.3(–3) cm × 1.5–8(–13) mm, margins entire, surfaces pubescent abaxially with stalked, 2–4-rayed trichomes, 0.1–0.5 mm, adaxially with simple trichomes, 0.6–1 mm, with stalked, 2-rayed ones, to 0.7 mm.

5–20(–26);

sessile;

blade oblong to lanceolate or ovate, margins entire or dentate, surfaces pubescent as basal, sometimes adaxially with simple trichomes.

usually 0, rarely 1–3;

sessile;

blade similar to basal.

(10–)18–52(–72)-flowered, usually bracteate on proximalmost 1–12(–17) flowers, rarely ebracteate, elongated in fruit;

rachis not flexuous, pubescent as stem.

(3–)5–12(–16)-flowered, ebracteate, (subumbellate), not elongated in fruit;

rachis not flexuous, usually glabrous, rarely sparsely pubescent.

sepals (green or yellowish), oblong, 2.2–3 mm, pubescent, (trichomes simple and branched);

petals yellow, oblanceolate, 3.5–5 × 1.5–2.5 mm;

anthers ovate, 0.4–0.5 mm.

(late-season ones cleistogamous, apetalous);

sepals oblong, 1.5–2.3 mm, pubescent, (trichomes simple);

petals (rarely absent), white, spatulate, 2–4.5 × 1–1.5 mm;

anthers ovate, 0.4–0.5 mm.

divaricate-ascending to ascending or suberect, straight, 3–13(–20) mm, pubescent as stem.

horizontal to divaricate-ascending, straight, (1–)2–7(–9) mm, glabrous or glabrate.

(often subappressed to rachis), lanceolate to linear-lanceolate or narrowly oblong, slightly twisted or plane, flattened, (6–)9–14(–17) × 2–3.5 mm;

valves pubescent, trichomes simple and short-stalked, 2–4-rayed, 0.05–0.3 mm;

ovules 28–38(–44) per ovary;

style 0.5–1.2(–1.5) mm.

linear to linear-oblong, plane, flattened, (5–)7–16(–20) × 1.2–2.3 mm;

valves glabrous or pubescent, trichomes usually simple and antrorse, 0.1–0.3 mm, rarely with fewer, spurred or 2-rayed ones;

ovules 32–88 per ovary;

style 0.02–0.1 mm.

oblong, 0.9–1.3 × 0.5–0.7 mm.

oblong to ovoid, 0.5–0.8 × 0.3–0.5 mm.

= 74.

= 16, 30, 32.