Flora of North America species comparison

erect, dichotomously branched, 5–50 cm, retrorsely to spreading- pubescent throughout.

erect to ascending, much-branched distally, 5–20 cm, finely pubescent to puberulent.

stipules ovate-lanceolate, 2–6 mm, apex acuminate, entire;

blade linear to linear-oblanceolate or linear-oblong, 3–25 × 1–2.3 mm, herbaceous, apex ± acute, moderately antrorsely puberulent.

stipules lanceolate, 3–8 mm, apex acuminate, entire;

blade linear, 5–20 × 0.3–1 mm, leathery, apex minutely cuspidate, glabrous.

5-merous, cylindric to narrowly lanceolate, with enlarged hypanthium and calyx cylindric to tapering distally, 2.3–3.5 mm, pubescent mostly proximal with hooked or usually straight hairs, sometimes with scattered straight hairs distally;

sepals flecked or solid red-brown, white distally, midrib obscure, linear-lanceolate, 1.5–2 mm, papery, margins white, 0.1–0.2 mm wide, papery, apex terminated by mucro, hood obscure, narrowly rounded, mucro short-conic, ca. 0.1 mm, glabrous;

staminodes filiform, widening proximally, 0.5–0.6 mm;

style 1, cleft in distal 1/10.

5-merous, ± short-campanulate, with enlarged hypanthium and calyx widening distally, 2.4–3.2 mm, moderately pubescent proximately with antrorsely appressed to spreading hairs;

sepals green to tan, midrib and lateral pair of veins absent to evident, oblong, 1.2–1.3 mm, leathery to rigid, margins whitish to translucent, 0.05–0.1 mm wide, scarious, apex terminated by awn, hood ± obscure, narrowly rounded, awn widely divergent, 0.6–1.3 mm, broadly conic in proximal 1/3 with white to yellowish, scabrous spine;

staminodes subulate, 0.6–0.7 mm;

style 1, cleft in distal 1/2, 0.4–0.6 mm.

terminal and lateral, 15–50+-flowered, often forming large, congested clusters 5–30 mm wide.

terminal and lateral, 5–20+-flowered, dichasial and rather diffuse, forming clusters 3–15 mm wide.

broadly ellipsoid to ± globose, 0.5–0.7 mm, smooth, glabrous.

ovoid-oblong, 1 mm, smooth, glabrous.

= 64.