Flora of North America species comparison

prostrate to ascending, much-branched, 5–60 cm, often retrorsely pubescent on 1 side.

prostrate to sprawling, much-branched, 8–15 cm, scabrous-puberulent to puberulent throughout.

stipules lanceolate, 2.5–8 mm, apex acute, entire;

blade linear to linear-lanceolate or -oblanceolate, 5–30 × 0.5–2 mm, leathery, apex acute, often mucronate, sparsely appressed-pubescent.

stipules lanceolate, 2–8 mm, apex acuminate, entire;

blade linear, 8–15(–23) × 0.5–1 mm, leathery, apex shortly cuspidate, puberulent.

5-merous, short-cylindric to ovoid, with enlarged hypanthium and calyx cylindric to tapering distally, 3.5–6.5 mm, pubescent with antrorse, slightly spreading, silky hairs;

sepals greenish to brownish, veins 3, obscure, ribs absent, narrowly lanceolate, 2–3.2 mm, leathery to rigid, margins translucent, ca. 0.1 mm wide, scarious, apex terminated by awn, hood narrowly triangular, awn straight to slightly divergent, white, 0.9–2 mm, scabrous, spinose;

staminodes narrowly triangular, 0.4–0.6 mm;

style 1, cleft in distal 1/6, 1.4–2 mm.

5-merous, ± ovate, with prominently enlarged hypanthium and calyx tapering only slightly distally, 2.3–3.5 mm, puberulent;

sepals green to purple-brown, midrib and lateral pair of veins ± obscure, oblong to lanceolate-oblong, 1.7–2 mm, leathery to rigid, margins whitish to translucent, 0.05–0.1 mm wide, scarious, apex terminated by awn, hood prominent, rounded-triangular, awn divergent, conic in proximal 1/2–2/3 with yellowish, scabrous spine 0.7–0.9 mm;

staminodes filiform, 0.5–0.8 mm;

style 1, cleft in distal 1/3–2/3, 0.8–1.4 mm.

terminal, 15–25+-flowered, very compact, forming conspicuous glomerules 10–20 mm wide.

terminal, 3–7-flowered, branched, congested, in clusters 7–25 mm wide.

oblong, 1.5–1.8 mm, smooth, pubescent distally.

± ovoid, 0.8–0.9 mm, smooth, glabrous.

= 32.