Flora of North America species comparison

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

erect, simple, shorter than 1 m. Leaf blade linear, plano-convex or plano-keeled, widest near middle, 33–65 × 0.5–0.8 cm, slightly flexible, margins entire, white to grayish.

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.

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.

mostly green, racemose, sometimes paniculate proximally, occasionally paniculate and long-racemose distally, arising within rosettes, (5–)7–13 dm, glabrous;

bracts erect;

peduncle scapelike, 0.1–0.5 m, to 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 or rarely globose;

tepals distinct, cream or greenish, often tinged rose or rosy brown, narrowly elliptic to broadly elliptic, 5.5–7 × 2–3.2 cm;

filaments to 2.5 cm;

anthers 3.2–4.8 mm;

pistil 1.5–3.2 cm;

style white or pale yellowish green, 7 mm;

stigmas lobed.

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

erect, capsular, dehiscent, oblong-cylindric, occasionally constricted at middle, 5–5.7 × 2–2.5 cm, dehiscence septicidal.

glossy or dull black, thin, 6–10 mm.