Flora of North America species comparison

filiform.

filiform to slightly thickened.

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 arcuate-ascending, green, commonly purplish, 3–8 cm, glabrous, internodes of all stems 0.2–1.5 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.

tightly overlapping, usually connate proximally, with ± loose, scarious sheath 0.2–0.7 mm;

blade ascending to variously curved, green, commonly purplish, flat, prominently 1-veined abaxially, linear to subulate, 3–10 × 1–2 mm, flexuous, margins not thickened, scarious, smooth, apex green to purple, rounded, navicular, shiny, glabrous;

axillary leaves present among cauline leaves.

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

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

solitary flowers, terminal;

bracts linear to subulate, herbaceous.

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

1–4 cm, glabrous.

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 3-veined, midrib prominent, lateral veins 1/4–1/2 times as long as sepals, ovate to lanceolate (herbaceous portion ovate to lanceolate), 2–4 mm, not enlarging in fruit, apex often purple, rounded to acute, not hooded, glabrous;

petals oblong to obovate, 0.8–1 times as long as sepals, apex rounded, entire, rarely absent.

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

on stipe ca. 0.2 mm, ellipsoid, 2–4 mm, equaling sepals.

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

reddish brown, suborbiculate with radicle prolonged into rounded beak, somewhat compressed, 0.6–1 mm, tuberculate;

tubercles low, rounded, elongate.

= 30, 60.