Flora of North America species comparison

ascending to decumbent, several-branched from base, usually also irregularly branched distally, sometimes with a single, unbranched stem, 20–60(–120) cm.

erect or ascending, usually many-branched throughout, proximal branches often somewhat spongy, 50–120 cm.

in a basal rosette and cauline, 0.5–7.5(–9.5) × 0.1–2.2 cm, blade narrowly lanceolate to elliptic, margins subentire or shallowly sinuate-dentate.

in a basal rosette and cauline, softly succulent, 4–13.5 × 0.8–2.1 cm, petiole 0–1.5 cm, blade lanceolate to elliptic-lanceolate, margins remotely denticulate.

erect, flowers in axils of distalmost few nodes.

4-merous, zygomorphic, opening near sunset;

floral tube 4–14 mm;

sepals 7–11(–14) mm;

petals white, fading red, slightly unequal, elliptic, 6–10 mm, clawed;

filaments 4–8.5 mm, anthers 3–6 mm, pollen 90–100% fertile;

style 12–26 mm, stigma exserted beyond anthers at anthesis.

opening near sunrise;

buds with free tips 0.5–2(–5) mm, erect to spreading;

floral tube 14–20 mm;

sepals 20–30 mm;

petals bright yellow, fading pale pink or lavender, 16–27 mm;

filaments 10–15 mm, anthers 7–8 mm, pollen 85–100% fertile;

style 15–30 mm, stigma exserted beyond anthers at anthesis.

erect, pyramidal in distal 1/2, conspicuously bulging at base of distal pyramidal part, strongly 4-angled, conspicuously bulging at base, abruptly constricted to terete proximal part, 7–13 × 3–5 mm;

sessile.

oblong-clavate to oblong-ellipsoid, 4-angled or 4-winged, and wings 0.1–0.2 mm, 7–15 × 4–6 mm, stipe 2–5 mm;

sessile.

(2 or)3 or 4(–8), reddish brown, 2–2.5 × 1–1.3 mm.

0.8 × 0.4 mm.

= 28.

= 56.