Flora of North America species comparison

erect, (10–)20–40(–70) cm, glabrous to stipitate-glandular.

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

basal leaves sparse or absent;

cauline leaves usually in 5–12+ pairs, not significantly reduced;

basal blades ascending to arcuate-spreading or recurved, needlelike or narrowly linear, (0.7–)2–6(–7) cm × 0.8–2 mm, ± rigid, herbaceous to subsucculent, apex blunt to spinose, glabrous, 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.

3–20(–30)-flowered, ± compact cymes;

branches ascending to erect.

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

3–45 mm, glabrous or stipitate-glandular.

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

sepals 1–3-veined, ovate to lanceolate or elliptic, 4.5–7.2 mm, to 8 mm in fruit, margins narrow to broad, apex acute to acuminate, glabrous to sparsely stipitate-glandular;

petals white or yellowish, oblanceolate to spatulate, 6–11 mm, 1–2 times as long as sepals, apex entire or erose;

nectaries thickened, molarlike, apically 2-lobed, 1–1.5 mm, or narrowly longitudinally rectangular, truncate, 0.7–0.8 mm, densely minutely pubescent with erect to spreading hairs.

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.

6–8 mm, glabrous.

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

greenish or reddish brown to blackish, suborbicular to pyriform or ovoid, 1.3–3.2 mm, tuberculate, sometimes echinate on abaxial ridge;

tubercles low, rounded to conic.

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

tubercles rounded, elongate.