Flora of North America species comparison

many, ascending to erect, branched from base, 15–30(–40) cm.

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

2.5–3.5 × 0.1–0.2 cm, rarely fascicles of small leaves present in non-flowering axils;

petiole 0–0.1 cm;

blade linear to narrowly linear-lanceolate, folded lengthwise, base long-attenuate, margins subentire or serrulate, apex acute.

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.

opening near sunrise;

buds with free tips 0–0.5 mm;

floral tube 7 mm;

sepals 4–6 mm, midribs keeled;

petals yellow, fading yellow to orange, 15–20 mm; antisepalous filaments 5 mm, antipetalous filaments 2 mm, anthers 3–4 mm, pollen 90–100% fertile;

style 10 mm, stigma discoid to quadrangular, exserted beyond anthers at anthesis.

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.

18–20 × 2 mm, hard, dehiscent 1/2 their length, often tardily dehiscent throughout their length.

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.

oblanceoloid, 1–1.8 mm, sharply angled, apex truncate.

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

= 14.

= 28.