Flora of North America species comparison

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

usually 1 per caudex branch, arising from center of rosette, often somewhat elevated above ground surface on woody base, 1–5 dm, densely pubescent proximally, trichomes simple, 0.5–1 mm, mixed with long-stalked, 2- or 3-rayed ones, 0.1–0.5 mm, moderately to sparsely pubescent distally.

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.

blade oblanceolate, 4–8 mm wide, margins denticulate, ciliate along petiole, trichomes to 1 mm, surfaces densely pubescent, trichomes long-stalked, 2–5-rayed, 0.1–0.5 mm.

6–11, sometimes concealing stem proximally;

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

8–25, often concealing stem proximally;

blade auricles 1–3 mm, surfaces of distalmost leaves moderately pubescent.

5–17-flowered, unbranched.

12–34-flowered, usually unbranched.

erect at anthesis;

sepals glabrous;

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

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals purplish, 6–8 × 2–2.5 mm, glabrous;

pollen spheroid.

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

divaricate-ascending to horizontal, straight, 5–10 mm, pubescent, trichomes spreading, simple and 2-rayed.

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.

divaricate-ascending to horizontal, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 4–8 cm × 1.7–2.2 mm;

valves glabrous;

ovules 70–102 per ovary;

style 0.1–0.3 mm.

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

uniseriate, 1.4–1.8 × 1–1.3 mm;

wing continuous, 0.1–0.2 mm wide.