Flora of North America species comparison

1 per plant, arising from center of rosette near ground surface, 2.5–10(–12.5) dm, sparsely to densely pubescent proximally, trichomes simple, to 1 mm, glabrous or sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette, somewhat elevated on woody base or from ground surface, 0.6–3.5(–4.5) dm, densely pubescent proximally, trichomes long-stalked and simple, 2-rayed (sometimes all simple), 0.4–1 mm, sparsely pubescent or glabrous distally.

blade obovate to oblanceolate, 10–30 mm wide, margins dentate, ciliate proximally, trichomes simple, to 1 mm, surfaces moderately pubescent, trichomes simple, 0.5–1.5 mm, these mixed with smaller, 2- or 3-rayed ones.

blade oblanceolate, 3–7(–11) mm wide, margins entire or dentate, ciliate proximally, trichomes to 1 mm, surfaces densely pubescent, trichomes long-stalked, 2–4-rayed, 0.4–0.8 mm.

12–20, often concealing stem proximally;

blade auricles absent or proximalmost blades with auricles 0.5–2(–5) mm, surfaces of distalmost leaves sparsely pubescent.

5–15(–28), often concealing stem proximally;

blade auricles 0.5–3(–5) mm, surfaces of distalmost leaves pubescent.

15–65(–82)-flowered, sometimes branched.

7–20(–30)-flowered, usually unbranched.

divaricate-ascending to horizontal at anthesis;

sepals pubescent;

petals white, 3–5 × 0.7–1.2 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals usually purple (rarely lavender), 7–12 × 2–4 mm, glabrous;

pollen ellipsoid.

descending to horizontal, usually curved, rarely straight, 6–13(–17) mm, pubescent or glabrous, trichomes subappressed, usually 2-rayed.

ascending to divaricate-ascending, straight, 3–25 mm, pubescent or glabrous, trichomes spreading, simple and 2-rayed.

pendent to horizontal, not appressed to rachis, often secund, curved, edges parallel, 4–10 cm × 2.5–4 mm;

valves glabrous;

ovules 40–62 per ovary;

style 0.3–0.8(–1.1) mm.

ascending to divaricate-ascending, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 3.5–10 cm × 1.5–2.2 mm;

valves usually glabrous, rarely sparsely pubescent;

ovules 48–96 per ovary;

style 0.05–0.3 mm.

uniseriate, 1.7–3.5 × 1.5–2.2 mm;

wing continuous, 0.4–1 mm wide distally.

uniseriate, 1.2–1.7 × 1–1.2 mm;

wing continuous, 0.1–0.2 mm wide distally.

= 14.