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 diffusely spreading, much-branched proximally and distally;

main stem 0.3–0.7 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, 1.5–2 mm, apex acuminate;

blade linear, 0.6–2.3 cm, somewhat fleshy, apex blunt to apiculate;

axillary leaf cluster usually absent.

erect, divergent, or reflexed in fruit.

erect to reflexed 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 0.2–0.5 mm proximally, lobes 1-veined or not, lanceolate to ovate, 2.3–3.1 mm, enlarging little in fruit, margins 0.1–0.3 mm wide, apex obtuse to rounded;

petals white, elliptic to ovate, 0.7–0.8 times sepals;

stamens 4–7;

styles 0.4–0.6 mm.

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

greenish tan, 2.5–2.8 mm, 0.9–1.2 times 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.

black, often with silvery, not iridescent tinge, with submarginal groove, pyriform, somewhat compressed, 0.4–0.6 mm, shiny, sculpturing of low, elongate tubercles, not papillate (40x);

wing absent.

simple to 3-compound or flowers solitary and axillary.

simple but commonly 4–8+-compound.

= 18 (Europe).