Flora of North America species comparison

prostrate to erect, branched, 5–70 cm, mostly retrorsely to spreading-pubescent on 1 side or throughout.

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

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

blade oblong to elliptic or oblanceolate, 3–25 × 1–6 mm, herbaceous, apex acute and briefly cuspidate, glabrous.

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.

5-merous, ± short-cylindric, with enlarged hypanthium and calyx cylindric, 1–1.7 mm, glabrous to pubescent with short hairs, often minutely ciliate, sometimes glaucous;

sepals greenish or greenish white to brownish, veins absent, ovate to oblong, 0.8–1.3 mm, herbaceous, margins white, 0.05–0.1 mm wide, scarious to papery, apex terminated by minute cusp, hood narrowly rounded, cusp light green to whitish, straight, short-conic, 0.1–0.15 mm, minutely scabrous;

staminodes subulate, 0.2–0.3 mm;

style 1, cleft in distal 4/5+, 0.2–0.4 mm.

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.

terminal, 20–40+-flowered, diffuse, lax, repeatedly forked or dichotomous.

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

ellipsoid, 1–1.3 mm, papillate distally.

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