Flora of North America species comparison

becoming stout, woody.

slender.

erect to ascending, often arcuately so, much-branched proximally;

main stem 0.4–1.3 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, broadly lance-acuminate, 3–8 mm, apex mucronate;

blade filiform to linear, 1–4.2 cm, somewhat fleshy, apex apiculate or spine-tipped;

axillary leaves 2–4 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.

spreading to reflexed in fruit.

reflexed and oriented to 1 side in fruit.

sepals connate 0.5–0.7 mm proximally, lobes 1- or 3-veined, lance-ovate to lanceolate, 2.5–4 mm, to 5 mm in fruit, margins 0.1–0.6 mm wide, apex acute to acuminate but often briefly rounded at tip;

petals white, ± elliptic, 0.7–0.8 times as long as sepal;

stamens 7–10;

styles 0.4–0.6 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.

greenish to tan, (4–)5–6.5 mm, 1.1–1.3 times as long as sepals.

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

reddish brown to dark brown, often with submarginal groove, broadly ovate, plump, 0.4–0.5 mm, smooth, often sculptured with parallel, wavy lines, papillae often present;

wing often present, white, 0.1–0.2 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.

commonly 4–8+-compound.

= 18, 36 (both Europe).