Flora of North America species comparison

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

erect to ascending, much-branched, 4–10 cm, hirtellous.

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, 5–8 mm, apex acuminate, often deeply cleft;

blade lanceolate, 5–9 × 0.75–1.1 mm, leathery, apex pungently mucronate, minutely hirtellous to 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, ± short-campanulate, with enlarged hypanthium and calyx slightly constricted then widening distally, 3.3–4.5 mm, puberulent with mostly ascending hairs;

sepals red-brown, midrib and lateral pair of veins absent to evident, oblong, 1.7–2 mm, leathery to rigid, margins white, 0.2–0.3 mm wide, papery to scarious, apex terminated by awn, hood ± obscure, broadly rounded, awn moderately divergent, white, ± lanceoloid, 1.4–2.1 mm, scabrous, distinct spine absent;

staminodes ± triangular, 0.2–0.4 mm;

styles 2, 0.5–0.7 mm.

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

terminal and subterminal, 3–7(–10)-flowered, densely congested, forming large and conspicuous glomerules 5–15 mm wide.

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

subglobose to ± 4-angular, 1.2–1.3 mm, papillate distally.