Flora of North America species comparison

erect, (1–)3–20(–25) cm, stipitate-glandular or glabrous proximally.

erect to ascending, (3–)5–20(–25) cm, entirely glabrous or glabrous proximally, stipitate-glandular distally.

basal leaves abundant, persistent;

cauline leaves in (1–)4+ pairs, reduced distally or not;

basal blades erect or closely ascending to somewhat spreading, green to gray-green, filiform to needlelike or narrowly subulate, 0.3–3(–4) cm × 0.3–1.2 mm, flexuous or rigid, herbaceous, apex apiculate or stiff and spinose, glabrous to stipitate-glandular, not glaucous.

basal leaves abundant, persistent;

cauline leaves in 1–3 pairs, abruptly reduced distal to lowest pair;

basal blades erect, straight or often curved in one direction, filiform, (2–)4–8 cm × 0.5–1 mm, flexuous, herbaceous, apex acute or acuminate to weakly spinose, glabrous, sometimes stipitate-glandular, often glaucous.

(1–)3–13-flowered, ± open cymes.

1–12(–18)-flowered, open or rarely subcongested cymes.

2–15 mm, glabrous to densely stipitate-glandular.

(2–)5–20 mm, glabrous or stipitate-glandular.

sepals 1–3-veined, lateral veins less developed, ovate or lanceolate, (2.5–)2.8–5(–6) mm, not expanding in fruit, margins broad, apex obtuse to broadly acute or acuminate, glabrous or stipitate-glandular on herbaceous portion;

petals white or rarely pink, oblong to spatulate, (3–)4–7 mm, ca. 1.2–1.3 times as long as sepals, apex entire, erose, or 2-fid almost to base;

nectaries as abaxial, rounded lobe with transverse groove or elongate cup at base of filaments opposite sepals, 0.6 × 0.3 mm.

sepals often purplish, 1–3-veined, ovate to ovate-lanceolate, 3–4.7 mm, to 5 mm in fruit, margins broad, apex broadly rounded to barely acute, glabrous or stipitate-glandular;

petals white, spatulate, 6–10 mm, 1.5–2.5 times as long as sepals, apex broadly rounded;

nectaries as depressed transverse cup at base of filaments opposite sepals, 0.3–0.7 × 0.1–0.3 mm.

4.5–7 mm, glabrous.

5–8 mm, valves at least sparsely stipitate-glandular or glabrous.

black to brown, spheric or oblong to ovoid, 1.2–2.1 mm, low-tuberculate, sometimes papillate on abaxial ridge.

brown to black, ellipsoid to ovoid with hilar notch, (1.2–)1.5–2(–2.5) mm, tuberculate;

tubercles rounded, elongate.