Flora of North America species comparison

1–several, erect, mostly simple, occasionally 1–3-branched.

blade linear, often twisted, flat to concavo-convex, widest considerably beyond middle, 25–60 × 1.2–1.7 cm, glaucous, smooth, margins minutely denticulate, lemon yellow, hyaline, apex spinose, spine tipped.

blade lanceolate, straight, slightly concave, nearly flattened, widest at middle, 25–60 × 1–2(–2.5) cm, rigid, slightly glaucous, margins denticulate, yellow or reddish brown, hyaline.

paniculate, arising just within or beyond rosettes, ovoid, 3–10 dm;

branches up to 3.8 dm;

bracts erect;

peduncle sometimes scapelike, 0.3–1 m, less than 2.5 cm diam., glabrous or glabrescent.

narrowly paniculate, arising beyond rosettes, narrowly ovoid, 3.5–10 dm, densely pubescent;

bracts erect;

peduncle sometimes scapelike, 0.5–1.1 m, less than 2.5 cm diam.

pendent;

perianth globose to campanulate;

tepals distinct, white, narrowly ovate, 4.2–5.2 × 1.1–2 cm, apex sharply acuminate;

filaments 1.7–2 cm;

pistil 2.5–3.5 cm;

style white, 6–14 mm;

stigmas lobed.

pendent;

perianth campanulate;

tepals distinct, white or greenish white, ovate, 4–6 × 1.5–3 cm, apex sharply acuminate;

filaments 1.8–3.2 cm;

pistil 3–4.5 cm × 4–6 mm;

style white or greenish, 10–20 mm;

stigmas lobed.

erect, capsular, dehiscent, ovoid to ellipsoid, rarely constricted, 4–7 × 1.8–2.5 cm, dehiscence septicidal.

erect, capsular, dehiscent, ellipsoid, 4–6 × 1.8–3.2 cm, dehiscence septicidal.

dull black, thin, 5–7 mm diam.