Flora of North America species comparison

filiform.

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, 4–15 cm, trailing stems to 30 cm, glabrous, internodes of flowering stems ca. 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.

overlapping proximally, all evenly spaced, connate proximally, with tight, scarious sheath 0.5–0.7 mm;

blade arcuate, green, flat, 3-veined, needlelike to subulate, 3–6(–9) × 0.7–2 mm, ± rigid, margins scarious proximally, apex green, blunt to ± acute, dull, glabrous;

axillary leaves present among vegetative leaves.

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

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

5–20-flowered, open cymes;

bracts narrowly lanceolate, herbaceous, thinly scarious-margined.

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

0.5–2.5 cm, sparsely 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 dish-shaped;

sepals (1- or) 3-veined, narrowly lanceolate (herbaceous portion narrowly lanceolate), 5–6 mm, not enlarging in fruit, apex often purple, acute to acuminate, not hooded, sparsely stipitate-glandular;

petals broadly linear to oblong-elliptic, 0.7–0.9 times as long as sepals, apex rounded, entire to slightly emarginate.

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

ellipsoid, 4–4.8 mm, shorter than sepals.

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

purplish brown, elliptic-oblong, ± compressed, 1.8–2.2 mm, tuberculate;

tubercles low, rounded.