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.

erect to ascending, green, 3–10 cm, retrorsely puberulent or stipitate-glandular, internodes of flowering stems 2–6 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 (vegetative) or variably spaced (cauline), usually connate proximally, with tight, scarious to herbaceous sheath 1.2–1.5 mm;

blade straight to outwardly curved, green, obscurely 1-veined, linear (proximal vegetative) or subulate (cauline), rounded 3-angled (abaxial surface thickened, rounded, adaxial surface flat to concave), 5–20 × 0.4–1 mm, flexuous, margins not thickened, herbaceous, often ciliate, apex often purple, rounded to truncate, shiny, glabrous (vegetative) or glabrous to stipitate-glandular (cauline);

axillary leaves absent.

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

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

flowers solitary, terminal;

bracts narrowly lanceolate to oblong, herbaceous.

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

0.5–3 cm, usually densely 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 cup-shaped;

sepals prominently 3-veined proximally, lanceolate to narrowly ovate (herbaceous portion often purple, ovate to oblong), 4–8 mm, enlarging slightly in fruit, apex often purple, rounded, hooded, stipitate-glandular;

petals oblanceolate, 1.5–2 times as long as sepals, apex broadly rounded, entire.

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

narrowly ellipsoid, 9–10 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.

brown, suborbiculate with radicle prolonged into beak, compressed, 1.2–1.6 mm, minutely tuberculate (50x).

= 22 (Russia), 26 (Russia), 38 (Russia), 52, ca. 80.