Plants often forming open colonies of rosettes, acaulescent or short-caulescent, shorter than 2.5 m. Stems, if present, decumbent, 1-24, aerial or subterranean, simple or sometimes branched, to 2 m. Leaf blade erect, bluish green, concavo-convex, 30-100 × 2-6 cm, rigid, scabrous or glaucous, margins brown. Inflorescences erect, paniculate, dense, arising completely within to mostly extending beyond rosettes, ovoid, 6-8.2 dm, glabrous, rarely slightly pubescent; peduncle scapelike, to 0.8 m. Flowers pendent, 5-13 cm, nearly as wide; perianth campanulate; tepals connate basally to form shallow floral cup 7-12 mm, usually cream-colored, occasionally tinged with purple, 4.5-13 cm; filaments connate proximally into collarlike structure, 3.2-12 mm, fleshy, pubescent; anthers 5-7 mm; pistil 4.5-8 × 0.7-1.2 cm (usually 4-5(-7) times longer than broad); ovary 0.7-1.2 cm; style 5-7 mm; stigmas distinct. Fruits pendent, baccate, indehiscent, elongate, 5-23 × 4-7.5 cm, fleshy, succulent. Seeds dull black, obovate, 7-11 mm diam., 3 mm thick, rugose.