Flora of North America species comparison

stout, woody.

moderately stout.

ascending to spreading, green or often purple, 1–3 cm, glabrous, internodes of flowering stems 0.2–1 times as long as leaves.

erect to spreading, green, becoming purple, 12–30 cm, mostly glabrous, internodes of all stems 2–7 times as long as leaves.

overlapping, ± tightly (vegetative), ± evenly spaced proximally (cauline), connate-perfoliate proximally, with tight, herbaceous sheath 0.2–0.3 mm;

blade upwardly curved, green or often purple, keeled, prominently 1-veined abaxially, subulate, 3-angled, 1–4 × 0.5–0.7 mm, flexuous, margins rounded, herbaceous, smooth, apex green to purple, rounded, navicular, shiny, glabrous;

axillary leaves well developed.

sometimes overlapping proximally, often connate proximally, with loose, scarious to herbaceous sheath 0.2–0.5 mm;

blade straight to recurved, green, becoming purple, concave, prominently 1(–3)-veined abaxially, linear-lanceolate, 5–15 × 1–2.5 mm, rigid, margins not thickened, slightly scarious, smooth, apex green to purple, obtuse to acute, often apiculate, flat to navicular, dull, densely stipitate-glandular;

axillary leaves absent.

solitary flowers, axillary or terminal (rarely present);

bracts absent.

5–25+-flowered, open cymes;

bracts lanceolate to ovate, herbaceous.

0.1–2 cm, glabrous.

0.3–4+ cm, stipitate-glandular.

hypanthium disc-shaped;

sepals 1-veined, oblong-ovate (herbaceous portion usually purple, oblong-ovate), 1.5–2.5 mm, not enlarging in fruit, apex often purple, obtuse to acuminate, navicular, not hooded, glabrous;

petals obovate to spatulate, 1.5–2 times as long as sepals, apex obtuse, entire.

hypanthium disc-shaped;

sepals weakly veined proximally, ovate (herbaceous portion ovate to narrowly so), 1.9–3 mm, not enlarging in fruit, apex often purple, ± acute to acuminate, not hooded, stipitate-glandular proximally;

petals oblanceolate, 1.8–2.3 times as long as sepals, apex rounded, entire.

on stipe ca. 0.1–0.2 mm, spheric, 1.5–2.5 mm, equaling sepals.

on stipe ca. 0.2 mm, broadly ovoid, 2.7–3.5 mm, usually longer than sepals.

brown, suborbiculate, compression unknown, ca. 0.6 mm, obscurely reticulate.

blackish brown, suborbiculate with radicle prolonged to rounded beak, somewhat compressed, 1.4–1.7 mm, tuberculate;

tubercles low, rounded, often elongate.

= 58 (Russia), 60.