Flora of North America species comparison

erect, branched below and just above ground, branched also proximal to inflorescences, 40–120(–250) cm.

usually well-branched, 25–120 cm.

in a basal rosette and cauline, (1–)3–11 × (0.1–)0.5–2 cm, blade linear to narrowly oblanceolate, margins usually sparsely sinuate-dentate, rarely subentire, often undulate.

in a basal rosette and cauline, basal 7–11 × 0.1–2.3 cm, blade lyrate;

cauline 1–9.5 × 0.1–2.3 cm, blade narrowly lanceolate to linear, margins sinuate-dentate, undulate.

stout.

4-merous, zygomorphic, opening near sunset;

floral tube 2.5–5 mm;

sepals 7–14 mm;

petals white, fading pink to red, slightly unequal, elliptic, 7–15 mm;

stamens presented in lower 1/2 of flower, filaments 5–11 mm, lanate at very base, anthers 3–5 mm, pollen 90–100% fertile;

style 12–19 mm, stigma exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening at sunset;

floral tube 6.5–14 mm;

sepals 11–21 mm;

petals white, fading pink to red or sometimes purple, elliptic-obovate, 10–15 mm;

filaments 6–9 mm, anthers 2–6 mm, pollen 90–100% fertile;

style 16–32 mm, stigma exserted beyond anthers at anthesis.

narrowly ovoid, narrowly 4-winged or 4-angled, 8–15 × 1.5–3.5 mm, abruptly constricted to a long, sterile stipe 2–8 mm.

ovoid, narrowly 4-winged, furrowed between angles, 4.5–8 × 2–5 mm, abruptly tapering to stipe 0–1 mm;

sessile.

(1 or)2–4, light to reddish brown, 2–3 × 1–1.5 mm.

(1 or)2–4(or 5), yellowish to light brown, 2–3 × 1 mm.

= 28.

= 14.