Flora of North America species comparison

erect, unbranched or many-branched distally, (20–)30–200(–300) cm.

ascending to decumbent, 1–several from base, sometimes unbranched, erect or ascending, 5–30 cm.

in a basal rosette and cauline, basal 4–15 × 1.5–3 cm, petiole 0–1.8 cm, blade broadly oblanceolate, margins sinuate-dentate to dentate;

cauline 2–13 × 0.5–5 cm, petiole 0–2 cm, blade narrowly elliptic to narrowly ovate, margins sinuate-dentate to dentate.

in a basal rosette and cauline, 1.5–10 × 0.3–2.5 cm;

blade oblanceolate to oblong, margins subentire or coarsely dentate or pinnatifid.

relatively long, dense.

4-merous, nearly actinomorphic, opening near sunset;

floral tube 1.5–5 mm;

sepals 2–3.5 mm;

petals white, fading pale to dark pink, slightly unequal, oblong-obovate to elliptic-oblanceolate, 1.5–3 mm, abruptly clawed;

filaments 1.5–3 mm, anthers 0.5–1 mm, pollen 85–100% fertile;

style 3–9 mm, stigma surrounded by anthers at anthesis.

1–3 opening per day near sunset;

buds nodding, weakly quadrangular, without free tips;

floral tube 15–30 mm, mouth glabrous;

sepals 15–30 mm;

petals white, fading pink, usually obcordate, sometimes obovate, (15–)20–35(–40) mm;

filaments 11–17 mm, anthers 6–10 mm;

style 25–50 mm, stigma exserted beyond anthers at anthesis.

fusiform, terete, weakly angled in distal 1/3, angles becoming broad and rounded in proximal part, 5–11 × 1.5–3 mm, tapering abruptly toward base;

sessile.

ascending to erect, usually straight, sometimes curved, cylindrical, weakly 4-angled, 20–40 × 3–4 mm, dehiscent 1/2 their length;

sessile.

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

in 2 rows per locule, ellipsoid to subglobose, 0.8–1.5 × 0.5–0.9 mm, surface regularly pitted, pits in longitudinal lines.

= 14.

= 14.