Flora of North America species comparison

1 to several per caudex branch, arising from center of rosette or arising laterally proximal to sterile shoots, somewhat elevated on woody base or from ground surface, 2–5(–9) dm, usually glabrous proximally, rarely sparsely pubescent, trichomes simple and short-stalked, 2- or 3-rayed, 0.1–0.5 mm, glabrous distally.

usually 1 per plant, arising from center of rosette near ground surface, 2–7.5 dm, sparsely pubescent proximally, trichomes simple, to 0.5 mm, or glabrous throughout.

blade oblanceolate, (3–)5–15 mm wide, margins dentate, ciliate at least along petiole, trichomes to 1 mm, surfaces pubescent, trichomes short-stalked, 2–6-rayed, 0.1–0.5 mm.

blade oblanceolate, 5–18 mm wide, margins lyrate-pinnatifid, often ciliate-mucronate on lobes, trichomes minute, surfaces glabrous or sparsely pubescent, trichomes simple, 0.1–0.5 mm.

5–17(–21), sometimes concealing stem proximally;

blade auricles 0.5–3.5(–5.5) mm, surfaces of distalmost leaves glabrous.

10–45, often concealing stem proximally;

blade auricles 1–5 mm, surfaces glabrous.

10–30(–70)-flowered, usually unbranched.

18–47-flowered, sometimes branched.

ascending at anthesis;

sepals glabrous;

petals lavender, 6.5–8.5 × 1–2.5 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals white, 5–10 × 1–1.5 mm, glabrous;

pollen ellipsoid.

horizontal, gently curved downward, 10–27 mm, glabrous.

suberect to divaricate-ascending, straight or slightly curved, 5–13 mm, glabrous.

widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, 3–7 cm × 1.8–2.5 mm;

valves glabrous;

ovules 100–160 per ovary;

style 0.2–0.5 mm.

ascending to divaricate-ascending, not appressed to rachis, not secund, curved, edges parallel, 6–11 cm × 1.5–2 mm;

valves glabrous;

ovules 60–86 per ovary;

style 0.1–1 mm.

sub-biseriate, 1.1–1.6 × 0.9–1.1 mm;

wing continuous, 0.1–0.2 mm wide.

uniseriate, 1.2–2 × 1–1.2 mm;

wing continuous, 0.1–0.4 mm wide.