Flora of North America species comparison

filiform.

moderately stout.

erect to ascending, green, 5–20 cm, stipitate-glandular, often densely so, internodes of all stems 1–3 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 proximally, perfoliate proximally, with ± loose, scarious to herbaceous sheath 0.5–1 mm;

blade green, flat, 1-veined, oblanceolate to cuneate (proximal) to oblong-lanceolate to ovate (remaining cauline), 5–30(–35) × 2–4 mm, flexuous, margins not thickened, ± scarious, smooth, apex green to purple, obtuse to abruptly pointed, dull, glabrous;

axillary leaves absent.

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.

7–12-flowered, open cymes, or rarely solitary, terminal;

bracts ± lanceolate, herbaceous, sometimes scarious-margined proximally.

5–25+-flowered, open cymes;

bracts lanceolate to ovate, herbaceous.

reflexed in fruit, 0.5–2.5 cm, stipitate-glandular.

0.3–4+ cm, stipitate-glandular.

hypanthium disc-shaped;

sepals obscurely veined, ovate to broadly elliptic (herbaceous portion ovate to broadly elliptic), 3–6 mm, to 7 mm in fruit, apex green or purple, acute to acuminate, not hooded, stipitate-glandular;

petals obovate to oblanceolate, 2–2.5 times as long as sepals, apex rounded, broadly notched.

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.

sessile, broadly ellipsoid, 6–7.5 mm, equaling or longer than sepals.

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

dark brown to blackish, orbiculate with radicle prolonged into beak, only slightly compressed, 0.7–0.8 mm, echinate with rounded tubercles.

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

tubercles low, rounded, often elongate.