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).

unbranched, 0.5–1.5 dm, pubescent throughout, trichomes simple and long-stalked, 2-rayed, 0.3–1 mm, with smaller, 2–4-rayed ones, 0.1–0.5 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 base and margin ciliate, (trichomes simple, 0.5–1.2 mm);

blade oblanceolate, 1–3.1 cm × 2–7 mm, margins entire, surfaces densely pubescent, abaxially with stalked, (2–)4-rayed trichomes, 0.2–0.8 mm, adaxially mostly with long-stalked, 2-rayed trichomes, 0.6–1.3 mm, sometimes with simple and 3- or 4-rayed ones.

(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.

0 (or 1);

sessile;

blade oblong, margins entire, surfaces pubescent as basal.

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

rachis not flexuous, pubescent as stems distally.

12–43-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, 2–2.5 mm, pubescent, (trichomes short-stalked, 2–4-rayed);

petals yellow, linear-oblanceolate, 3–3.5 × 0.5–1 mm;

anthers oblong, 0.5–0.6 mm, (exserted).

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

divaricate to ascending, straight or curved, (6–)10–17 mm, pubescent as stem.

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.

oblong to linear-oblong, slightly twisted or plane, flattened, 6–10 × 2.5–4 mm;

valves pubescent, trichomes short-stalked, cruciform, 0.07–0.25 mm, sometimes with fewer, 2- or 3-rayed ones;

ovules 8–24 per ovary;

style (0.8–)1.2–3.5 mm.

oblong, 0.7–1.1 × 0.5–0.6 mm.

oblong, 1–1.2 × 0.6–0.8 mm.

= 32.