Flora of North America species comparison

erect, often branched, 30–100 cm.

erect, usually unbranched or with few ascending branches, 10–30(–45) cm.

in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, 2–6(–10.5) × 0.3–0.6(–1) cm;

petiole 0–2 cm;

blade narrowly oblong to oblong-lanceolate, margins usually entire, sometimes remotely denticulate or repand-denticulate.

in a basal rosette and cauline, basal 2–5 × 0.5–1.5 cm, petiole 0.5–2 cm, blade oblanceolate to elliptic, margins subentire;

cauline 3–6 × 0.2–0.6 cm, petiole 0.2–0.6(–1.5) cm, blade narrowly lanceolate to linear, margins subentire.

erect, flowers in leaf axils in distal 1/2 of plant.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, with free tips 1–2 mm;

floral tube 15–40 mm;

sepals 20–30 mm, not spotted;

petals white, fading pink, broadly obovate or obcordate,15–30 mm;

filaments 15–18 mm, anthers 8–10 mm;

style 35–45 mm, stigma exserted beyond anthers at anthesis.

opening near sunrise;

buds with free tips to 1 mm, erect to spreading;

floral tube 4–10 mm;

sepals 4–8 mm;

petals pale yellow, fading pale pink, 5–14 mm;

filaments 3–7 mm, anthers 2–4 mm, pollen 85–100% fertile;

style 3–7 mm, stigma surrounded by anthers.

erect or ascending, woody in age, straight or slightly curved, cylindrical, obtusely 4-angled, especially toward base, tapering slightly from base to apex, 20–30 × 2–3 mm;

sessile.

broadly clavate, 4-angled, 5–15 × 3–5 mm, stipe 2–5 mm;

sessile.

numerous, in 1 row per locule, reddish dark brown, narrowly obovoid, 1.5–2.3 mm.

1 × 0.5 mm.

= 14, 28.

= 14.