Flora of North America species comparison

becoming stout, woody.

slender.

erect or ascending to prostrate, usually branched proximally;

main stem 0.8–3 mm diam. proximally.

erect to ascending, simple to diffusely branched proximally and distally;

main stem occasionally prostrate, 0.2–1.5 mm diam. proximally.

stipules conspicuous, dull white to tan, narrowly triangular, 4.5–11 mm, apex long-acuminate;

blade linear, (0.6–)1–5.5 cm, fleshy, apex apiculate to spine-tipped;

axillary leaves 1–2+ per cluster.

stipules inconspicuous, silvery to dull tan, broadly triangular, 1.4–2.4 mm, shorter than wide, apex acuminate;

blade linear, 0.5–3.5 cm, somewhat fleshy, apex blunt to apiculate;

axillary leaf cluster usually absent.

erect, divergent, or reflexed in fruit.

reflexed and oriented to 1 side in fruit.

sepals connate 0.5–1.8 mm proximally, lobes often 3-veined, ovate to lanceolate, 4.5–7 mm, to 8 mm in fruit, margins 0.3–0.7 mm wide, apex blunt to rounded;

petals white or pink to rosy, elliptic to obovate, 0.9–1.3 times as long as sepals in flower;

stamens 9–10;

styles 0.6–3 mm.

sepals connate 0.2–0.3 mm proximally, lobes 1–3-veined, lanceolate to ovate, 2.5–3.6 mm, to 4 mm in fruit, margins 0.1–0.5 mm wide, apex rounded;

petals white to pink or rosy, lanceolate, 0.4–0.6 times as long as sepals;

stamens 1–4(–5);

styles 0.3–0.4 mm.

tan, 4.6–10 mm, 0.8–1.4 times as long as sepals.

greenish to tan, 2.8–4 mm, 0.9–1.4 times as long as sepals.

± red-brown, often with submarginal groove or depression, suborbiculate to pyriform, compressed, (0.6–)0.7–1.2 mm, smooth to faintly or prominently tuberculate or sculpturing of parallel, wavy lines or of low, rounded mounds, not papillate;

wing absent or white to reddish brown proximally, 0.1–0.3 mm wide, margins irregular.

reddish brown to blackish, silver tinged, with submarginal groove, pyriform, ± compressed, 0.5–0.7(–0.8) mm, shiny, slightly roughened, with dense, gland-tipped papillae and appearing echinate (30x);

wing usually absent, whitish to reddish brown, 0.1–0.2 mm wide, margins irregular and not papillate.

simple to 3-compound or flowers solitary and axillary.

commonly 4–8+-compound.

= 18, 36 (both Europe).