Flora of North America species comparison

usually unbranched, sometimes several-branched from base, 60–180 cm.

1–several, ascending to decumbent, 7–65 cm.

in a basal rosette and cauline, 0.8–13 × 0.1–1.6 cm;

blade often red-blotched, narrowly lanceolate to narrowly oblanceolate, margins slightly to conspicuously sinuate-dentate.

in a basal rosette and cauline, basal 1–6 × 0.3–2 cm, blade narrowly elliptic to elliptic or ovate, margins subentire, weakly serrulate, or sinuate-pinnatifid;

cauline 1–6 × 0.3–2 cm, blade narrowly elliptic to narrowly ovate, margins subentire or weakly serrulate, proximal ones sinuate-pinnatifid.

erect.

3 or 4-merous, often mixed on a single plant, zygomorphic, opening near sunset;

floral tube 3–8 mm;

sepals 2.5–8 mm;

petals white, fading pink, narrowly elliptic-obovate, 4.5–8 mm;

filaments 2.5–6 mm, anthers 0.5–2 mm, pollen 90–100% fertile;

style 7.5–19 mm, stigma surrounded by or slightly exserted beyond anthers.

1–3 opening per day near sunrise;

buds with free tips 0.1–1 mm;

floral tube 4–8 mm;

sepals 6–12 mm;

petals rose purple, fading darker, 4–12 mm;

filaments 4–6 mm, anthers 2–3.5 mm, pollen 35–65% fertile;

style 7–13.5 mm, stigma surrounded by anthers at anthesis.

ellipsoid or ovoid, 3-(or 4-)angled, 5–9 × 2–3 mm;

sessile.

narrowly obovoid, 4–12 × 2–4 mm, apex attenuate to a sterile beak, proximal stipe 5–20 mm, gradually tapering to base, valve midrib prominent in distal part;

sessile.

2–4, yellowish to light brown, 1.2–2.3 × 0.8–1.1 mm.

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

= 14.

= 14.