Flora of North America species comparison

ascending to erect, unbranched or well-branched at base and distally, 15–100 cm.

sometimes with lateral branches arising obliquely from rosette, 30–100(–150) cm.

in a basal rosette and cauline, basal 3–15 × 0.5–1 cm, blade lyrate;

cauline 1–9 × 0.1–0.8 cm, blade linear to very narrowly elliptic or narrowly lanceolate, margins sinuate-dentate to subentire.

in a basal rosette and cauline, basal 6–20 × 0.6–2 cm, cauline 3–15 × 0.8–2.5 cm;

blade narrowly oblanceolate, gradually narrowly elliptic to narrowly lanceolate, oblanceolate, or ovate distally, margins lobed to remotely dentate or subentire;

bracts slightly longer than capsule they subtend.

dense, usually without lateral branches, mature buds usually not overtopping spike apex.

4-merous, zygomorphic, opening at sunset;

floral tube 6–10 mm;

sepals 6–12 mm;

petals white, fading pink to red, narrowly obovate, 5.5–9.5 mm, short-clawed;

filaments 4–6 mm, anthers 2–3 mm, pollen 90–100% fertile;

style 11–19 mm, stigma surrounded by anthers at anthesis.

2–several per spike opening per day near sunset;

buds erect, with free tips erect, 0.5–3 mm;

floral tube slightly curved upward to ± straight, 30–45 mm;

sepals 15–30 mm;

petals yellow, broadly elliptic to rhombic-elliptic, 15–35 mm;

filaments 13–25 mm, anthers 3–8 mm, pollen 85–100% fertile;

style 25–50 mm, stigma exserted beyond anthers at anthesis.

ellipsoid or narrowly obovoid, narrowly 4-winged, furrowed between wings, 6–8 × 2–3 mm, narrowed at base, stipe 0 mm;

sessile.

narrowly lanceoloid, 13–25 × 2.5–3 mm.

4, yellowish to reddish brown, 2–3 × 1–1.5 mm.

brown, sometimes flecked with dark red spots, ellipsoid, 1–1.7 × 0.4–0.7 mm.

= 14.

= 14.