Flora of North America species comparison

usually well-branched distal to base, 50–400 cm.

ascending, usually well-branched from base and distally, rarely unbranched, 15–60 cm.

in a basal rosette and cauline, 3–7 × 0.2–0.8 cm;

blade narrowly elliptic to elliptic or lanceolate, margins subentire or shallowly undulate-denticulate.

in a basal rosette and cauline, 1.5–8 × 0.2–0.6(–1.5) cm, blade very narrowly elliptic to oblanceolate or oblong-elliptic, margins entire or weakly sinuate-dentate.

4-merous, zygomorphic, opening at sunrise;

floral tube 4–13(–15) mm;

sepals 13–20 mm;

petals white, fading pink, rhombic-obovate, 10–17 mm;

filaments 8–17 mm, anthers 3–7 mm, pollen 90–100% fertile;

style 18–32 mm, stigma exserted beyond anthers at anthesis.

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

floral tube 4–5.5 mm;

sepals 4.5–6 mm;

petals white, fading pink, elliptic-obovate, 3.5–5 mm;

filaments 2–3.5 mm, anthers 1.5–3 mm, pollen 35–65% fertile;

style 9–10 mm, stigma surrounded by anthers.

ellipsoid or ovoid, sharply 4-angled, 4.5–7 × 1.5–2.5 mm;

sessile.

narrowly obovoid, 3(or 4)-winged, furrowed between wings, 7–9 × 3–5 mm, narrowed at base;

sessile.

2–4, yellowish to reddish brown, 1.2–3 × 0.7–1.3 mm.

(1 or)2–5, yellowishto light brown, 1.5–3.5 × 1–1.5 mm.

= 14.

= 14.