Flora of North America species comparison

unbranched or branched primarily distally, 25–70 cm.

ascending, usually well-branched from base and distally, rarely unbranched, 15–60 cm.

in a basal rosette and cauline, basal 6–12 × 0.7–2 cm, cauline 2–10 ×0.5–3 cm;

subsessile;

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

bracts shorter than capsule they subtend, 0.5–1.7 cm.

in a basal rosette and cauline, 1.5–8 × 0.2–0.6(–1.5) cm, blade very narrowly elliptic to oblanceolate or oblong-elliptic, margins entire or weakly sinuate-dentate.

open, lax, usually unbranched, mature buds usually overtopping spike apex.

1–few per spike opening per day near sunset;

buds erect, with free tips erect, 1–3 mm;

floral tube nearly straight, 20–40 mm;

sepals 15–25 mm;

petals yellow, broadly elliptic to rhombic-ovate, 20–30 mm;

filaments 17–22 mm, anthers 4–7 mm, pollen 85–100% fertile;

style 50–65 mm, stigma usually exserted beyond anthers at anthesis.

3(or 4)-merous, zygomorphic, opening at sunset;

floral tube 4–5.5 mm;

sepals 4.5–6 mm;

petals white, fading pink, elliptic-obovate, 3.5–5 mm;

filaments 2–3.5 mm, anthers 1.5–3 mm, pollen 35–65% fertile;

style 9–10 mm, stigma surrounded by anthers.

narrowly lanceoloid, 15–33 × 2–3 mm.

narrowly obovoid, 3(or 4)-winged, furrowed between wings, 7–9 × 3–5 mm, narrowed at base;

sessile.

dark brown, ellipsoid, 1–1.4 ×0.4–0.6 mm.

(1 or)2–5, yellowishto light brown, 1.5–3.5 × 1–1.5 mm.

= 14.

= 14.