Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 1.5–7(–10.5) dm, densely pubescent proximally, trichomes short-stalked, 2–8-rayed, 0.1–0.2 mm, sparsely pubescent 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 oblanceolate, 2–7 mm wide, margins entire or shallowly dentate, sometimes ciliate at petiole base, surfaces densely pubescent, trichomes short-stalked, 5–10-rayed, 0.05–0.2 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.

15–40, concealing stem proximally;

blade auricles 0.5–2.5 mm or, rarely, absent, surfaces of distalmost leaves pubescent.

8–18, usually not concealing stem;

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

15–80(–140)-flowered, usually unbranched.

20–38-flowered, usually unbranched.

pendent at anthesis;

sepals pubescent;

petals white to lavender, 4–8 × 0.8–2.2 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.

reflexed, abruptly recurved at base, otherwise usually straight, 7–12(–18) mm, pubescent, trichomes appressed, branched.

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

strongly reflexed, usually appressed to rachis, sometimes somewhat secund, straight, edges parallel, 3.5–9 cm × 0.9–1.8 mm;

valves glabrous or sparsely pubescent throughout;

ovules 60–116 per ovary;

style 0.5–2 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, 1–1.4 × 0.9–1.2 mm;

wing continuous, to 0.1 mm wide.

sub-biseriate, 2–2.5 × 1.3–1.6 mm;

wing continuous, 0.2–0.25 mm wide.

= 14.