Flora of North America species comparison

erect or ascending, unbranched or branched, 30–60 cm.

erect, unbranched or with few, spreading branches, 30–50(–80) cm.

in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, 3–9 × (0.6–)1–2.5 cm;

petiole 0–2 cm;

blade oblong to lanceolate or narrowly ovate, margins irregularly sinuate-dentate.

in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, (1–)2–6(–8) × 1–2(–3) cm;

sessile;

blade lanceolate to oblong lanceolate, proximal ones sometimes oblanceolate, margins coarsely repand-dentate or -pinnatifid.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, with free tips 0.5–4 mm;

floral tube 30–50 mm;

sepals 20–30 mm, not spotted;

petals white, fading pink, broadly obovate, 20–30 mm;

filaments 10–15 mm, anthers 8–15 mm;

style 50–70 mm, stigma exserted beyond anthers at anthesis.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, without free tips;

floral tube 20–30 mm;

sepals 13–21 mm, not spotted or with scattered small, maroon spots;

petals white, fading pink, broadly obovate or obcordate, 15–30 mm;

filaments 14–16 mm, anthers 6–8 mm;

style 40–50 mm, stigma exserted beyond anthers at anthesis.

erect or strongly ascending, not woody, straight or slightly curved, subcylindrical, obtusely 4-angled, tapering gradually from base to apex, 20–30 × 2–3 mm;

sessile.

widely spreading, woody in age, straight or slightly curved, cylindrical, obtusely 4-angled, especially toward base, tapering gradually from base to apex, 30–60 × 2–3 mm;

sessile.

numerous, in 1 row per locule, dark brown, narrowly obovoid, 1.5 mm.

numerous, in 1 row per locule, brown, narrowly obovoid, 1–1.5 mm.

= 14.

= 14.