Flora of North America species comparison

erect, branched or unbranched, 30–300 cm.

5–40 cm.

in a basal rosette and cauline, basal 3–7 × 0.5–2 cm, sessile, blade oblong to oblong-lanceolate, base usually ± auriculate, margins entire;

cauline 3–8(–10) × 0.4–1.8 cm, blade lanceolate to oblong-lanceolate, gradually smaller, becoming linear-subulate distally.

1–6 × 0.3–3 cm;

petiole 0.1–1.1 cm;

blade usually lanceolate to oblanceolate, sometimes elliptic, margins weakly serrate to sinuate-pinnatifid.

long, wandlike, unbranched or branched.

4-merous, nearly actinomorphic, opening near sunrise;

floral tube 6–17 mm;

sepals 4–6 mm;

petals white, fading off-white or tinged pink, slightly unequal, rhombic, 4–6 mm, abruptly clawed;

filaments 5–8 mm, anthers 1.5–2 mm, pollen 85–100% fertile;

style 6–10, stigma exserted beyond anthers at anthesis.

1–3 opening per day near sunset;

buds with free tips 0–0.5 mm;

floral tube 5–31 mm;

sepals 10–27 mm;

petals white, fading pink, 8–25 mm;

filaments 6–12 mm, anthers 3–5 mm, pollen 35–65% fertile;

style 12–30 mm, stigma surrounded by anthers at anthesis.

ovoid, 4-angled, somewhat flattened, 3–4 × 1.5–2.3 mm, valves with raised midrib and conspicuous lateral veins;

sessile.

broadly clavate or obovoid, 7–31 ×3–5 mm, winged, wings 0.5–1.5 mm, valve surface with prominent midrib, proximal stipe 3–17 mm;

sessile.

1, pale yellow, oblanceoloid, 2.4–2.6 × 1–1.5 mm.

narrowly obovoid, 0.9–1.2 × 0.4–0.5 mm.

= 14.

= 14.