Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette, elevated on woody base or from ground surface, (2–)3–8 dm, densely pubescent proximally, trichomes short-stalked, 2-rayed and simple, to 1 mm, pubescent distally.

usually 2–5 per caudex branch, arising laterally proximal to sterile shoots or rosette, often elevated above ground surface on woody base, (1.5–)2–7 dm, densely pubescent proximally, trichomes short-stalked, Y-shaped, 0.2–0.4 mm, often mixed with 3–5-rayed or (rarely) simple ones, usually glabrous distally.

blade linear to oblanceolate, 2–7(–12) mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes to 1.5 mm, surfaces densely pubescent, trichomes usually short-stalked, 2–5-rayed (rarely some simple), 0.4–0.8 mm.

blade oblanceolate to obovate, 3–15(–20) mm wide, margins dentate, ciliate proximally, trichomes to 1.2 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 3–6-rayed, 0.2–0.4 mm.

10–30(–45), often concealing stem proximally;

blade auricles 2–5(–6) mm, surfaces of distalmost leaves pubescent.

4–12(–17), not concealing stem;

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

12–50(–70)-flowered, usually unbranched.

16–35-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals purple, 9–14 × 2–4 mm, glabrous or sparsely pubescent (trichomes abaxially);

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals white to purplish, 5–9 × 1–1.5 mm, glabrous or sparsely pubescent (occasionally some trichomes abaxially);

pollen ellipsoid.

usually divaricate-ascending, rarely horizontal, gently recurved or straight, 8–22 mm, pubescent, trichomes subappressed, 2–4-rayed.

usually horizontal, straight or slightly recurved, (6–)10–25 mm, usually glabrous.

usually divaricate-ascending, rarely horizontal, not appressed to rachis, not secund, usually curved, edges parallel, (6–)8–13 cm × 1.5–2.2 mm;

valves glabrous or trichomes relatively few, scattered;

ovules 90–250 per ovary;

style 0.01–0.5 mm.

widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, (3–)4–7 cm × 1.7–2.1 mm;

valves glabrous;

ovules 60–96 per ovary;

style 0.05–0.4 mm.

uniseriate or sub-biseriate, 1.5–1.7 × 1–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

uniseriate, 1.1–1.5 × 0.9–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

= 14.