Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.2–)2.5–6 dm, densely pubescent proximally, trichomes short-stalked, 4–10-rayed, 0.1–0.2 mm, sparsely pubescent or glabrous distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.5–)3–9 dm, glabrous or pubescent proximally, trichomes sessile, 2–4-rayed (some simple), to 0.7 mm, glabrous distally.

blade linear to narrowly oblanceolate, 1–4 mm wide, margins entire, ciliate near petiole base, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 4–10-rayed, 0.1–0.2 mm.

blade oblanceolate, 2–10 mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes (simple), to 0.8 mm, surfaces sparsely to densely pubescent, trichomes sessile, 2–6-rayed, 0.1–0.4 mm.

5–10, not concealing stem;

blade auricles 1–1.5 mm, surfaces of distalmost leaves usually sparsely pubescent.

(10–)15–56, concealing stem proximally;

blade auricles 1–5 mm, surfaces of distalmost leaves glabrous.

10–25-flowered, often sparingly branched.

12–40(–65)-flowered, usually unbranched.

divaricate-ascending at anthesis;

sepals pubescent;

petals white to lavender, 3.5–6 × 0.7–1 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals glabrous or with scattered trichomes;

petals usually purple, rarely lavender, 6–9 × 1.5–3 mm, glabrous;

pollen spheroid.

divaricate-ascending to horizontal, often straight proximally, usually strongly recurved or reflexed distally, 4–17 mm, usually pubescent, rarely glabrous, trichomes appressed, branched.

divaricate-ascending to horizontal, straight, 5–12 mm, glabrous.

pendent, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 2.5–5.5 cm × 1.7–2.5 mm;

valves glabrous;

ovules 34–64 per ovary;

style 0.05–0.2 mm.

divaricate-ascending to horizontal, not appressed to rachis, not secund, straight, edges parallel, (4.5–)5.5–11 cm × 1.7–2.5 mm;

valves glabrous;

ovules 114–142 per ovary;

style 0.05–0.2 mm.

uniseriate, 1.4–1.8 × 1–1.2 mm;

wing continuous, 0.25–0.5 mm wide.

uniseriate to sub-biseriate, 1.4–2 × 1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

= 14.

= 21.