Flora of North America species comparison

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.

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.7–2.2 dm, glabrous throughout.

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.

blade oblanceolate, 1–2 mm wide, margins entire, ciliate near petiole base, trichomes (simple), to 0.4 mm, surfaces sparsely to densely pubescent, trichomes short-stalked, 4–8-rayed, 0.03–0.1 mm.

4–12(–17), not concealing stem;

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

6–11, sometimes concealing stem proximally;

blade auricles to 0.5 mm, surfaces of distalmost leaves glabrous.

16–35-flowered, usually unbranched.

5–17-flowered, unbranched.

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.

erect at anthesis;

sepals glabrous;

petals white, 3–4 × 0.5–0.8 mm, glabrous;

pollen ellipsoid.

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

erect, straight, 2–4(–7) mm, glabrous.

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.

erect, usually appressed to rachis, not secund, straight, edges parallel, 2–3.5 cm × 2.2–2.5 mm;

valves glabrous;

ovules 60–96 per ovary;

style 0.05–0.2 mm.

uniseriate, 1.1–1.5 × 0.9–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

sub-biseriate, 0.7–0.9 × 0.5–0.6 mm, not winged or minutely winged distally.

= 14.