Flora of North America species comparison

ascending, usually well-branched from base and distally, rarely unbranched, 15–60 cm.

erect, branched below and just above ground, branched also proximal to inflorescences, (40–)60–250 cm.

in a basal rosette and cauline, 1.5–8 × 0.2–0.6(–1.5) cm, blade very narrowly elliptic to oblanceolate or oblong-elliptic, margins entire or weakly sinuate-dentate.

in a basal rosette and cauline, basal 3–13 × 0.6–2.5 cm, blade spatulate to oblanceolate, cauline (1–)2.5–12 × 0.1–1 cm, blade linear to narrowly oblanceolate, margins slightly to conspicuously sinuate-dentate.

slender.

3(or 4)-merous, zygomorphic, opening at sunset;

floral tube 4–5.5 mm;

sepals 4.5–6 mm;

petals white, fading pink, elliptic-obovate, 3.5–5 mm;

filaments 2–3.5 mm, anthers 1.5–3 mm, pollen 35–65% fertile;

style 9–10 mm, stigma surrounded by anthers.

4-merous, zygomorphic, opening near sunset;

floral tube 3–9 mm;

sepals 6–12 mm;

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

stamens presented in lower 1/2 of flower, filaments 3–7 mm, anthers 2.5–5 mm, pollen 90–100% fertile;

style 9.5–19 mm, stigma exserted beyond anthers at anthesis.

narrowly obovoid, 3(or 4)-winged, furrowed between wings, 7–9 × 3–5 mm, narrowed at base;

sessile.

lanceoloid to narrowly ovoid, narrowly 4-winged, 7–12 × 1.5–2.5 mm, tapered to a sterile stipe 2–5 mm.

(1 or)2–5, yellowishto light brown, 1.5–3.5 × 1–1.5 mm.

(2 or)3 or 4(or 5), light brown or reddish brown, 1.5–2.5 × 0.8–1.3 mm.

= 14.

= 14.