Flora of North America species comparison

15–50 cm.

2.5–10 × 0.6–2.5 cm;

petiole 0.2–2.2 cm;

blade usually lanceolate to oblanceolate, sometimes elliptic, margins weakly serrate to sinuate-pinnatifid.

1–3 opening per day near sunset;

buds with free tips 0.5–3 mm;

floral tube 10–30 mm;

sepals 20–40 mm;

petals white, fading pink, 20–43 mm;

filaments 12–18 mm, anthers 5–10 mm, pollen 85–100% fertile;

style 19–67 mm, stigma exserted beyond anthers at anthesis.

broadly clavate or obovoid, 20–51 × 5–7 mm, winged, wings 2–4 mm, valve surface with prominent midrib, proximal stipe 8–45 mm;

sessile.

narrowly obovoid, 1–1.5 × 0.5–0.7 mm.

= 14.