Flora of North America species comparison

ascending to erect, stout, unbranched or with lateral stems from basal rosette, densely leafy, 15–30 cm.

unbranched or branched mainly in distal part, 25–70 cm.

10–14(–14.5) × 1.5–2.3(–3) cm;

petiole 4.3–6.6 cm;

blade narrowly oblanceolate, margins irregularly and coarsely dentate, apex acute.

in a basal rosette and cauline, basal 7–15 × 1–2.5 cm, cauline 3–13 ×0.4–2.3 cm;

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

bracts longer than capsule they subtend, 1–3 cm.

dense, often with several lateral branches, mature buds usually overtopping spike apex.

usually 5–10 per stem opening per day near sunset, with heavy, sweet scent;

buds erect;

floral tube 31–60 mm;

sepals 17–26 mm;

petals white, fading pale pink, 20–26 mm;

filaments 11–16 mm, anthers 8–11 mm;

style 65–96 mm, stigma exserted beyond anthers at anthesis.

2–several per spike opening per day near sunset;

buds erect, with free tips erect or spreading, 1–6 mm;

floral tube nearly straight, 25–47 mm;

sepals 15–30 mm;

petals yellow, broadly elliptic to nearly rhombic, 18–35 mm;

filaments 15–30 mm, anthers 3–8 mm, pollen 85–100% fertile;

style 45–75 mm, stigma usually exserted beyond anthers at anthesis.

straight, lanceoloid, obtusely 4-angled, (21–)25–30(–35) × (5–)6–8 mm, tapering to a sterile beak 6–8 mm, dehiscent 1/2–2/3 their length, valve margins with 5–8 conspicuous, irregular tubercles, sometimes 2 or more coalesced into a sinuate ridge, also with conspicuous medial ridge throughout;

pedicel 0.5–1 mm.

lanceoloid, 13–25 × 2.5–4 mm.

numerous, usually in 2 distinct rows per locule, sometimes rows partially overlapping, narrowly obovoid, 2.1–2.3 × 1–1.3 mm, embryo slightly less than 1/2 seed volume, surface appearing finely striate but papillose under magnification;

seed collar with membrane intact at maturity, membrane rarely splitting and separating from collar, margin entire.

brown, often flecked with darker spots, ellipsoid to broadly ellipsoid, 1.1–1.8 × 0.4–0.8 mm.

= 14.