Flora of North America species comparison

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

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

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 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.

(1–)3–13-flowered, ± open cymes.

10–30(–80)-flowered, diffuse cymes;

branches spreading.

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

15–55 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 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.

4.5–7 mm, glabrous.

6–7 mm, glabrous.

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

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

tubercles low, rounded to conic.