Flora of North America species comparison

erect to ascending, usually unbranched, 10–40 cm.

erect, several-branched near ground, also branched proximal to inflorescences, 60–280 cm.

in a basal rosette and cauline, basal 5–12 ×1.3–3.5 cm, cauline 2–8.5 ×1–3 cm;

blade green, narrowly oblanceolate to narrowly elliptic or narrowly lanceolate, margins usually dentate to pinnatifid, sometimes subentire;

bracts spreading, flat.

in a basal rosette and cauline, 0.5–8 × 0.15–2 cm, sessile, blade narrowly lanceolate or oblanceolate to very narrowly elliptic or linear, margins usually subentire or shallowly sinuate-dentate, sometimes deeply sinuate-dentate, often undulate.

slender.

usually 1 opening per day near sunset;

buds erect, with free tips erect, 0.5–2 mm;

floral tube 25–40 mm;

sepals 10–22 mm;

petals yellow, fading orange or reddish tinged, broadly obovate or shallowly obcordate, 13–25 mm;

filaments 10–17 mm, anthers 4–5 mm, pollen 85–100% fertile;

style 35–50 mm, stigma slightly exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening near sunset;

floral tube 1.5–5 mm;

sepals 6–14 mm;

petals white, fading pink to red, slightly unequal, elliptic, 7–13 mm, clawed;

stamens presented in lower 1/2 of flower, filaments 4.5–11 mm, anthers 2–4.5 mm, pollen 90–100% fertile;

style 9–19 mm, stigma exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 20–45 × 2–2.5 mm.

lanceoloid to narrowly ovoid, 4-winged, 9–19 × 1–3.5 mm, abruptly constricted to a long, sterile stipe 2–10 mm.

ellipsoid, 0.8–1.4 × 0.3–0.6 mm.

(1 or)2–4, 2–3(–4) × 0.8–1.3 mm, yellowish to light brown or rarely reddish brown.

= 14.