Flora of North America species comparison

erect, 3–10(–15) cm, glabrous.

erect, (10–)20–40(–100) cm, glabrous to stipitate-glandular.

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 sparse or absent;

cauline leaves usually in 5–7 pairs, not significantly reduced;

basal blades ascending, needlelike or narrowly linear, 2–6(–7) cm × 0.5–1 mm, ± rigid, herbaceous to subsucculent, apex blunt to spinose, usually glabrous, not glaucous.

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

10–30(–80)-flowered, diffuse cymes;

branches spreading.

ca. 0.1–3(–4) mm, glabrous.

15–55 mm, glabrous or stipitate-glandular.

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 1–3-veined, ovate to lanceolate or elliptic, 3–4.3 mm, to 5.5 mm in fruit, margins narrow to broad, apex acute to acuminate, glabrous to sparsely stipitate-glandular;

petals white or yellowish, oblanceolate to spatulate, 6–9 mm, 1–1.5 times as long as sepals, apex entire or erose;

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

2.3–3.3 mm, glabrous.

6–7 mm, glabrous.

black, pyriform, 1.2–1.7 mm, tuberculate.

reddish brown to blackish, suborbicular to pyriform or ovoid, 1.3–3.2 mm, tuberculate;

tubercles low, rounded to conic.