Flora of North America species comparison

filiform.

moderately stout, woody.

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, green, 5–20 cm, glabrous except in inflorescence, glaucous, internodes of stems 0.5–4 times as long as leaves (proximal leaves longer than internodes);

rhizomes and trailing stems 5–20 cm.

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.

loosely overlapping proximally, ± evenly spaced, connate proximally, with tight, scarious sheath 0.2–0.6 mm;

blade straight or outwardly curved, green, shallowly concave (dorsiventrally flattened, curved into trough), 1-veined abaxially, needlelike, 4–15 × 0.5–1.2 mm, ± flexuous, margins not thickened, scarious in proximal 1/5, smooth, apex green to purple, acute to obtuse, sometimes apiculate, navicular, dull, glabrous, glaucous;

axillary leaves well developed among proximal cauline leaves.

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

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

12–25-flowered, open cymes;

bracts subulate, herbaceous, margins scarious proximally.

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

0.4–3 cm, often 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 obscurely 1-veined, narrowly ovate to lanceolate (herbaceous portion narrowly ovate to lanceolate), 2.5–4 mm, not enlarging in fruit, apex green to purple, acute to acuminate, not hooded, glabrous or very sparsely stipitate-glandular;

petals oblanceolate to narrowly oblong-elliptic, 1.4–2.2 times as long as sepals, apex rounded, entire.

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

sessile, ovoid, 3.5–4.3 mm, 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.

reddish brown to brown, oblong-elliptic, compressed, 2.3–2.8 mm, tuberculate;

tubercles low, rounded.