Flora of North America species comparison

blade lanceolate, straight, flat except becoming concave near apex, widest above middle, 20–50 × 1–4.5 cm, flexible, glaucous, margins denticulate or sometimes wavy, yellow.

blade lanceolate, twisted, strongly concave, widest at middle, distinctly narrowing toward base, broadened at stem attachments, 35–60 × 1.7–4 cm, somewhat fleshy, flexible, margins denticulate or wavy, dark orange or reddish brown, apex pointed.

paniculate, often distally racemose, arising beyond rosettes, 7–12 dm, with wide-spreading branchlets 1.5–2.3 dm;

bracts erect;

peduncle scapelike, 0.6–1.3 m, less than 2.5 cm diam., glaucous.

paniculate, arising beyond rosettes, narrowly ovoid, 2.5–10 dm;

branches 0.7–2 dm;

bracts erect;

peduncle scapelike, 0.3–1.5 m, 1.5–2 cm diam.

pendent;

perianth campanulate;

tepals distinct, greenish white, elliptic to ovate, 5–6.5 × 2–3.2 cm;

filaments 1.8–3.2 cm;

pistil 3.2–4 cm;

style white, 13–20 mm;

stigmas lobed.

pendent;

perianth campanulate;

tepals distinct, white or greenish white, ovate, 4–7 × 1.5–3 cm, apex sharply acuminate;

filaments 1.8–3.2 cm;

pistil 2.5–4.5 cm;

style white or greenish, 12–20 mm;

stigmas lobed.

erect, capsular, dehiscent, oblong-cylindric, 4.5–5.5 × 1.3–2 cm, dehiscence septicidal.

erect, capsular, dehiscent, ellipsoid to cylindric, 4–5.5 × 2–3 cm, dehiscence septicidal.

dull black, thin, 5–7 mm diam.

dull black, thin, 6–8 mm diam.