Flora of North America species comparison

1 per caudex branch, arising from center of rosette near ground surface, ca. 1 dm, densely pubescent proximally, trichomes stalked, (2 or) 3–6-rayed, 0.2–0.5 mm, glabrate distally.

usually 2–5 per caudex branch, arising laterally proximal to sterile shoots, often elevated on woody base, 1.2–4(–5) dm, densely pubescent proximally, trichomes short-stalked, 4–7-rayed, 0.1–0.3 mm, sparsely pubescent or glabrous distally.

blade oblanceolate, 4–6 mm wide, margins entire, not ciliate, surfaces moderately pubescent, trichomes long-stalked, 3–6 (or 7)-rayed, 0.2–0.5 mm.

blade narrowly oblanceolate, 2–5(–8) mm wide, margins entire, rarely ciliate near petiole base, trichomes (simple or spurred), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 3–7-rayed, 0.05–0.3 mm.

2–5, concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves pubescent.

4–12(–17), rarely concealing stem proximally;

blade auricles 0.5–2 mm, surfaces of distalmost leaves sparsely pubescent.

3- or 4-flowered, unbranched.

6–15(–25)-flowered, usually unbranched.

not seen.

divaricate-ascending at anthesis;

sepals pubescent;

petals whitish (often aging pale lavender), 5–7 × 1–1.5 mm, glabrous;

pollen ellipsoid or spheroid.

erect-ascending, straight, 4–5 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

slightly descending, gently recurved, 5–16 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

erect-ascending, sometimes appressed to rachis, not secund, straight, edges parallel, 3–4 cm × ca. 5 mm;

valves glabrous;

ovules ca. 16 per ovary;

style 0.5–0.7 mm.

widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, 2.5–5.6 cm × 1.2–2 mm;

valves glabrous;

ovules 48–74 per ovary;

style 0.1–0.2 mm.

uniseriate, 5.5–6.5 × 4–4.5 mm;

wing continuous, 1–2 mm wide.

uniseriate, 1–1.3 × 0.8–1 mm;

wing often continuous, 0.1–0.15 mm wide.

= 14.