Flora of North America species comparison

erect, 3–10(–15) cm, glabrous.

erect, 7–18 cm, glabrous.

basal leaves persistent;

cauline leaves in 6–10 pairs, closely overlapping, not reduced;

basal blades arcuate-spreading, needlelike, (0.6–)1–2 cm × ca. 1 mm, ± rigid, herbaceous, apex spinose, glabrous, not glaucous.

basal leaves persistent;

cauline leaves in 5 pairs, not reduced (stems leafy);

basal blades spreading, needlelike, 1.5–2 cm × 0.5–1 mm, rigid, not fleshy, apex spinose, glabrous, glaucous.

3–45+-flowered, usually congested, subcapitate cymes.

5–13-flowered, open cymes.

ca. 0.1–3(–4) mm, glabrous.

4–12 mm, glabrous to stipitate-glandular distally.

sepals 1–3-veined, linear-lanceolate, (5–)8.5–12 mm, not enlarging in fruit, margins narrow, apex acuminate, glabrous;

petals white, oblong-lanceolate to narrowly spatulate, 7–9 mm, 0.8–1.1 times as long as sepals, apex rounded to blunt;

nectaries not apparent.

sepals 1-veined, narrowly to broadly lanceolate, 4.5–5 mm, 6.5–7.5 mm in fruit, margins narrow, apex acuminate to spinose, glabrous to stipitate-glandular distally;

petals yellowish white, narrowly spatulate, 7.5–8.5 mm, 1.5–1.7 times as long as sepals, apex emarginate;

nectaries as lateral and abaxial rounding of base of filaments opposite sepals, 0.3–0.4 mm.

2.3–3.3 mm, glabrous.

ca. 6 mm, glabrous.

black, pyriform, 1.2–1.7 mm, tuberculate.

color not known, orbicular, ca. 1 mm, surface not known (mature seeds not observed).