Flora of North America species comparison

unbranched or with branched central stem and ascending to decumbent lateral branches arising from rosette, 5–50(–80) cm.

ascending, branched below or just above ground, branched also proximal to inflorescences, 30–70(–120) cm.

in a basal rosette and cauline, basal 5–14 × 0.5–2.5 cm, cauline 2–8 × 0.5–2.5 cm;

blade narrowly oblanceolate to narrowly elliptic or narrowly oblong, margins usually dentate to deeply lobed;

bracts spreading, flat.

in a basal rosette and cauline, basal 3–17 × 0.8–2 cm, blade oblanceolate, cauline 1–6.5 × 0.1–1.5 cm, sessile, blade narrowly oblanceolate to elliptic, margins conspicuously sinuate-dentate, often undulate.

slender.

usually 1 opening per day near sunset;

buds with free tips erect, 0.1–1 mm;

floral tube erect, becoming recurved and nodding, then erect again just before anthesis, 15–50 mm;

sepals 5–25 mm;

petals yellow, fading reddish orange, broadly obovate to obcordate, 5–25(–35) mm;

filaments 6–18 mm, anthers (2–)3–9 mm, pollen ca. 50% fertile;

style 20–60 mm, stigma surrounded by or slightly exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening near sunset;

floral tube 2–3.5 mm;

sepals 6–12 mm;

petals white, fading dark pink to red, slightly unequal, elliptic-obovate, 7–11 mm, long-clawed;

stamens presented in lower 1/2 of flower, filaments 5–9 mm, lanate at very base, anthers 2–4 mm, pollen 90–100% fertile;

style 9–16 mm, stigma exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged distally, 20–45 ×2–4 mm.

reflexed, lanceoloid to narrowly ovoid, narrowly 4-winged, 8–19 × 1.5–2 mm, tapering to a sterile stipe 3–9 mm.

brown, sometimes dark-flecked, 0.9–1.5 × 0.6–1 mm.

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

= 14.

= 14.