Flora of North America species comparison

usually 2–4 per plant or caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 2–6 dm, pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.15–0.4 mm, sparsely pubescent or glabrous distally.

usually 1 from per caudex branch, arising from center of leaf tuft, elevated above ground surface on woody base, (3–)5–7.5 dm, pubescent proximally, trichomes short-stalked, 2–5-rayed, 0.25–0.9 mm., similarly pubescent distally.

blade obovate to oblanceolate, (6–)10–45 mm wide, margins dentate, not ciliate, surfaces sparsely pubescent, abaxially trichomes short-stalked, 3- or 4-rayed, 0.15–0.4 mm, adaxially simple ones, 0.4–1 mm.

blade linear-oblanceolate to oblanceolate, 3–7 mm wide, margins entire or somewhat dentate, ciliate near petiole base, trichomes (simple), to 1.5 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.15–0.5 mm.

4–20, rarely concealing stem;

blade auricles 1–8 mm, surfaces of distalmost leaves sparsely pubescent.

8–18, usually not concealing stem;

blade auricles 1–2 mm, surfaces of distalmost leaves sparsely pubescent.

14–66-flowered, sparingly branched.

20–38-flowered, usually unbranched.

divaricate at anthesis;

sepals glabrous or sparsely pubescent;

petals white or cream, 2–3.5 × 0.7–1 mm, glabrous;

pollen ellipsoid.

divaricate to pendent at anthesis;

sepals pubescent;

petals purple, 9–12 × 2–3.5 mm, sparsely pubescent (often some trichomes abaxially);

pollen spheroid.

divaricate-ascending to slightly descending, straight, 1–6 mm, glabrous or pubescent, trichomes appressed, branched.

descending-divaricate, usually recurved, 9–20 mm, usually pubescent, rarely glabrous, trichomes subappressed, branched.

divaricate-ascending to slightly descending, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 1.3–4.2 cm × 0.7–0.8 mm;

valves usually sparsely pubescent throughout, rarely glabrous;

ovules 14–44 per ovary;

style 0.1–0.5 mm.

reflexed, not appressed to rachis, not secund, straight, edges parallel, 5–7 cm × 2–2.5 mm;

valves glabrous proximally, sparsely pubescent distally;

ovules 98–126 per ovary;

style 0.1–0.5 mm.

uniseriate, 0.7–1.1 × 0.5–0.6 mm;

not winged.

sub-biseriate, 2–2.5 × 1.3–1.6 mm;

wing continuous, 0.2–0.25 mm wide.