Flora of North America species comparison

several–many, ascending, unbranched or branched, 25–50 cm.

erect, branched below and just above ground, branched also proximal to inflorescences, 40–120(–250) cm.

in a basal rosette and cauline, basal (1–)2.5–6.5 × 0.6–2.3 cm, blade narrowly elliptic to narrowly ovate or ovate, margins weakly serrulate to sinuate-pinnatifid;

cauline 1–5.5 × 0.6–2 cm, blade narrowly elliptic to narrowly ovate, margins weakly serrulate.

in a basal rosette and cauline, (1–)3–11 × (0.1–)0.5–2 cm, blade linear to narrowly oblanceolate, margins usually sparsely sinuate-dentate, rarely subentire, often undulate.

erect.

stout.

1–3 opening per day near sunrise;

buds with free tips 0–1 mm;

floral tube 15–26 mm;

sepals 15–23 mm;

petals rose purple, fading darker, 12–25(–30) mm;

filaments 9–13 mm, anthers 3.5–6mm, pollen 85–100% fertile;

style 26–36 mm, stigma exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening near sunset;

floral tube 2.5–5 mm;

sepals 7–14 mm;

petals white, fading pink to red, slightly unequal, elliptic, 7–15 mm;

stamens presented in lower 1/2 of flower, filaments 5–11 mm, lanate at very base, anthers 3–5 mm, pollen 90–100% fertile;

style 12–19 mm, stigma exserted beyond anthers at anthesis.

clavate or narrowly obovoid, 9–15 × 3.5–6 mm, apex attenuate to a sterile beak, valve midrib prominent in distal part, proximal stipe 7–12(–28) mm, gradually taperingto base;

sessile.

narrowly ovoid, narrowly 4-winged or 4-angled, 8–15 × 1.5–3.5 mm, abruptly constricted to a long, sterile stipe 2–8 mm.

narrowly obovoid, 0.8–1 × 0.2–0.4 mm.

(1 or)2–4, light to reddish brown, 2–3 × 1–1.5 mm.

= 14.

= 28.