Flora of North America species comparison

1–several, ascending, 5–60 cm.

usually well-branched from base and distally, rarely unbranched, 15–65(–85) cm.

in a basal rosette and cauline, basal 2–7 × 0.3–1.4 cm, blade narrowly elliptic to narrowly ovate, margins weakly serrulate to sinuate-pinnatifid;

cauline 1.2–6 × 0.3–1 cm, blade narrowly elliptic to elliptic or ovate, proximal ones sinuate-pinnatifid, margins subentire or weakly serrulate.

in a basal rosette and cauline, basal 6–9.5 × 1–2 cm, blade lyrate;

cauline 1–7 × 0.1–2.3 cm, blade narrowly lanceolate to oblanceolate, margins shallowly sinuate-denticulate to subentire.

erect.

1–3 opening per day near sunrise;

buds with free tips 0–0.1 mm;

floral tube 9–14 mm;

sepals 7.5–13 mm;

petals rose purple, fading darker, 8–15 mm;

filaments 4–9 mm, anthers 2.5–4 mm, pollen 85–100% fertile;

style 12–19 mm, stigma surrounded by anthers at anthesis.

(3- or)4-merous, zygomorphic, opening at sunset;

floral tube 6–12 mm;

sepals 10–15 mm;

petals white, fading pink to purple, elliptic-obovate, 8–13 mm;

filaments 5–8 mm, anthers 2–4 mm, pollen 90–100% fertile;

style 15–24 mm, stigma exserted beyond anthers at anthesis.

clavate or narrowly obovoid, 9–14 × 3–4 mm, apex attenuate to a sterile beak, valve midrib prominent in distal part, proximal stipe 4–15 mm, gradually tapering to base;

sessile.

ellipsoid, narrowly (3- or)4-winged, deeply furrowed between wings, 6–10 × 2–3 mm, with or without prominent lower corners, narrowed to a stipe 0–1 mm;

sessile.

narrowly obovoid, 0.7–0.9 × 0.3–0.5 mm.

3 or 4, yellowish to reddish brown, 2–3 × 1–1.5 mm.

= 14.

= 14.