Flora of North America species comparison

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

prostrate to erect, much-branched, 5–50 cm, retrorsely pubescent throughout.

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, 1.5–7 mm, apex acuminate, entire;

blade linear-oblong to oblanceolate, 3–20 × 0.5–3 mm, herbaceous, apex obtuse to subacute, sparsely antrorsely pubescent.

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, cylindric, with enlarged hypanthium and calyx constricted then widening distally, 1.2–2.2 mm, pubescent, sometimes only slightly so, mostly proximally with straight or usually hooked hairs;

sepals red-brown, white distally, midrib and lateral pair of veins becoming prominent, linear to oblong, 0.6–1.2 mm, papery, margins white, 0.03–0.1 mm wide, papery, apex terminated by mucro, hood obscure, narrowly rounded, mucro short-conic, 0.05–0.1 mm, glabrous;

staminodes triangular, 0.2–0.4 mm;

style 1, cleft (2- or 3-lobed) in distal 1/5, 0.5–1.3 mm.

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

terminal and lateral, 15–50+-flowered, densely congested, ± spheroid clusters 3–5 mm wide.

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

ovoid to subglobose, 0.4–0.6 mm, ± smooth, glabrous.