Flora of North America species comparison

erect, usually branched several cm belowground or from near base, sometimes also branched distally, 20–60(–100) cm.

erect or ascending, single to several from base, unbranched or many-branched throughout, 10–50(–70) cm.

in a basal rosette and cauline, basal 2–4 × 0.4–0.8 cm, petiole0–0.4 cm, blade narrowly oblanceolate to narrowly spatulate;

cauline 0.5–5 × 0.1–0.8 cm, petiole 0–0.3 cm, blade narrowly lanceolate or very narrowly elliptic, margins subentire or sinuate-denticulate.

cauline, rosette usually weakly developed or absent, at least during flowering, sometimes well developed, 1–5(–7.8) × 0.3–1(–1.5) cm;

petiole 0–2(–4.5) cm;

blade lanceolate, oblong, linear-lanceolate, or ovate, margins subentire or remotely denticulate, deeply sinuate-dentate, or pinnatifid, sometimes repand.

4-merous, nearly actinomorphic, opening near sunset;

floral tube 9–13 mm;

sepals 7–9 mm;

petals white, fading pink to pale red, slightly unequal, rhombic, 7–8 mm, short-clawed;

filaments 3–4 mm, anthers 4–5 mm, pollen 85–100% fertile;

style 18–22 mm, stigma exserted beyond anthers at anthesis.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, with free tips 0–2 mm;

floral tube 15–40 mm;

sepals 10–30 mm, not spotted;

petals white, fading pink to deep pink, broadly obovate or obcordate, (10–)15–25(–40) mm;

filaments 9–15 mm, anthers 3–10 mm;

style 25–55 mm, stigma exserted beyond anthers at anthesis.

erect, fusiform, often slightly curved, weakly 4-angled, (9–)13–17 × 2–3 mm, valves with inconspicuous raised midrib;

sessile.

spreading to reflexed, straight to curved or contorted, cylindrical, obtusely 4-angled, tapering slightly from base to apex, 15–60 × 1.5–2.5 mm;

sessile.

(1–)3 or 4, yellowish or light brown, 2–3.5 × 1–2 mm.

numerous, in 1 row per locule, brownish with dark spots or black, narrowly obovoid, 1.5–2.2 mm.

= 14.