Flora of North America species comparison

erect to decumbent, much branched, 10–50(–90) cm.

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

in a basal rosette and cauline, basal 4–8 × 0.7–1 cm, cauline 1–7 × 0.3–1.5 cm;

blade usually grayish green, narrowly oblong to narrowly elliptic or narrowly obovate, margins remotely shallowly dentate to subentire;

bracts spreading, flat.

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.

usually 1 opening per day near sunset;

buds erect, with free tips erect and appressed or slightly spreading, 0.5–2 mm;

floral tube 15–35 mm;

sepals3–11 mm;

petals yellow, very broadly obovate or obcordate, 4.5–16 mm;

filaments 4–11 mm, anthers 2–5.5 mm, pollen ca. 50% fertile;

style 23–45 mm, stigma surrounded by anthers at anthesis.

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.

cylindrical, sometimes slightly enlarged toward apex, 15–45 × 2–3 mm.

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

sessile.

usually ellipsoid to broadly ellipsoid, rarely subglobose, 1–2 × 0.5–0.9 mm.

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

= 14.

= 14.