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.

ascending to erect or procumbent, green, (0.8–)3–12 cm, glabrous, internodes of all stems 0.5–10 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.

barely if at all overlapping, connate proximally, with tight, scarious to herbaceous sheath 0.2–0.5 mm;

blade straight to slightly outward curved, green, flat, 1-veined, occasionally 3-veined abaxially, linear to linear-oblong or subulate, (2–)4–10 × (0.3–)0.5–1.5 mm, flexuous, margins not thickened, scarious, smooth, apex green or purple, mostly rounded, slightly navicular, shiny, glabrous;

axillary leaves present among proximal cauline leaves.

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

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

1–3(–5)-flowered, open cymes or flowers solitary, terminal;

bracts subulate, herbaceous.

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

0.3–3 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 1–3-veined, often prominently, becoming ribbed in fruit, broadly elliptic to ovate (herbaceous portion broadly elliptic to ovate), (1.5–)2.5–3.2 mm, to 4 mm in fruit, apex green to purple, acute to acuminate, not hooded, glabrous;

petals lanceolate to spatulate or orbiculate, (0.6–)0.8–1 times as long as sepals, apex rounded, entire, or petals rudimentary or absent.

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

on stipe ca. 0.1–0.2 mm, ovoid, 2.5–3.2 mm, shorter than or equaling sepals.

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

brown or reddish brown, orbiculate with radicle prolonged into rounded bump, somewhat compressed, 0.4–0.6 mm, smooth or obscurely low-tuberculate (50x).

= 22 (Europe), 26, 30 (Europe).