Flora of North America species comparison

usually branched, rarely unbranched, (0.3–)0.6–3(–4) dm, densely pubescent proximally, trichomes simple, 0.4–1.3 mm, with fewer 2–4-rayed ones, to 0.3 mm, (distally with mostly branched trichomes, with fewer, simple ones).

usually unbranched, rarely branched, 0.3–1.9(–2.8) dm, moderately to densely hirsute throughout, trichomes simple, 0.2–1.3 mm, with short-stalked to subsessile, cruciform, 0.02–0.4 mm, and 2-rayed ones, 0.3–0.9 mm.

rosulate;

petiolate;

petiole base and margin ciliate, (trichomes simple, 0.2–0.7 mm);

blade lanceolate or oblanceolate to spatulate, 0.5–2.9 cm × 1–5(–9) mm, margins dentate, surfaces pubescent, abaxially with stalked, cruciform, or 2- or 3-rayed trichomes, 0.1–0.4 mm, (rarely with a branched ray), adaxially with simple trichomes, 0.1–0.7 mm, and stalked, 2–4-rayed ones.

rosulate;

petiolate;

petiole ciliate, (trichomes simple, 0.4–1.5 mm);

blade oblanceolate, 1–5(–6) cm × 2–5(–10) mm, margins usually entire, rarely denticulate, surfaces pubescent, abaxially with stalked, cruciform trichomes, 0.07–0.5 mm, adaxially often similar, sometimes with fewer, simple and 2-rayed trichomes, 0.4–1.3 mm.

(15–)22–54(–76), (densely imbricate at least basally);

sessile;

blade ovate to oblong or lanceolate (base often densely bearded abaxially, trichomes simple, to 1.3 mm), margins dentate, surfaces pubescent as basal.

3–10;

sessile;

blade ovate to lanceolate or oblong, margins entire or denticulate, surfaces pubescent as basal.

(11–)17–36(–48)-flowered, bracteate basally, elongated or not in fruit;

rachis not flexuous, pubescent as stems distally.

10–37(–58)-flowered, ebracteate, elongated in fruit;

rachis not flexuous, pubescent as stem.

sepals ovate, 2–2.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);

petals white, spatulate, 3.5–4.5 × 1–2 mm;

anthers ovate, 0.3–0.4 mm.

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

petals yellow, oblanceolate, 3.5–6 × 1.2–1.8 mm;

anthers oblong, 0.8–1 mm.

erect to ascending, (subappressed to rachis), straight, (1.5–)2.5–6(–13) mm, pubescent, trichomes 2–4-rayed and simple.

divaricate-ascending, straight, 4–10 mm, pubescent throughout, trichomes simple (0.1–0.5 mm) and subsessile, 2–4-rayed, (0.03–0.2 mm).

oblong to linear-lanceolate or elliptic, slightly twisted or plane, flattened, 5–10(–12) × 1.5–2.5(–3) mm;

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

ovules (24–)30–40 per ovary;

style 0.01–0.25 mm.

lanceolate to elliptic, often strongly twisted, flattened, 5–11 × 2–3 mm;

valves puberulent at least along margin, trichomes simple, antrorse, 0.03–0.15 mm;

ovules 14–24 per ovary;

style 0.8–1.8(–2.5) mm.

oblong, 0.7–1.1 × 0.5–0.6 mm.

ovoid, 1–1.4 × 0.6–0.9 mm.

= 32.