Flora of North America species comparison

erect, branched or unbranched, 30–300 cm.

many, erect, 4–60 cm.

in a basal rosette and cauline, basal 3–7 × 0.5–2 cm, sessile, blade oblong to oblong-lanceolate, base usually ± auriculate, margins entire;

cauline 3–8(–10) × 0.4–1.8 cm, blade lanceolate to oblong-lanceolate, gradually smaller, becoming linear-subulate distally.

in a basal rosette and cauline, basal 2–9 × 0.3–3.2 cm, blade oblanceolate to obovate, margins subentire or sinuate-pinnatifid;

cauline 1–10 × 0.3–3.5 cm, blade narrowly elliptic to ovate, margins subentire or serrulate to sinuate-pinnatifid.

long, wandlike, unbranched or branched.

sharply nodding.

4-merous, nearly actinomorphic, opening near sunrise;

floral tube 6–17 mm;

sepals 4–6 mm;

petals white, fading off-white or tinged pink, slightly unequal, rhombic, 4–6 mm, abruptly clawed;

filaments 5–8 mm, anthers 1.5–2 mm, pollen 85–100% fertile;

style 6–10, stigma exserted beyond anthers at anthesis.

1–3 opening per day near sunrise in some populations, near sunset in others;

buds with free tips 0–4 mm;

floral tube 12–25 mm;

sepals 15–50 mm;

petals pink to rose, fading darker, or white, fading pink, 15–45 mm;

filaments 10–22 mm, anthers 6–16 mm, pollen 85–100% fertile;

style 20–55 mm, stigma exserted beyond anthers at anthesis.

ovoid, 4-angled, somewhat flattened, 3–4 × 1.5–2.3 mm, valves with raised midrib and conspicuous lateral veins;

sessile.

narrowly obovoid to narrowly rhombic-ellipsoid, angled, 10–25 × 3.5–6 mm, apex attenuate to a sterile beak, valve midrib prominent, proximal stipe cylindrical, not tapering to base, (4–)8–15 mm;

sessile.

1, pale yellow, oblanceoloid, 2.4–2.6 × 1–1.5 mm.

narrowly obovoid, 1–1.2 × 0.5–0.6 mm.

= 14.

= 14, 28, 42.