Plants forming large colonies, caulescent or appearing acaulescent, not distinctly arborescent, 1.2–2.8 m; rosettes usually large. Stems often procumbent, usually 7 or more per colony, thick, 0.6–1.3 m. Leaf blade yellow-green, linear-lanceolate, plano-convex or plano-keeled, widest near middle, 20–70 × 0.7–2.2 cm, flexible, margins entire, curled, filiferous, whitish, apex tapering to short spine. Inflorescences paniculate, sometimes distally racemose, arising beyond rosettes, narrowly ellipsoid, 10–15 dm; branches 1–2 dm; bracts erect; peduncle scapelike, 1–1.6 m, 2.5–4.5 cm diam. Flowers pendent; perianth campanulate; tepals distinct, creamy white, broad-elliptic or ovate, 4–5 × 2–2.5 cm; filaments 2–2.5 cm; anthers 2–3 mm; pistil 2.5–3.5 cm; style white, 5–10 mm; stigmas lobed. Fruits erect, capsular, dehiscent, oblong-cylindric, 5–6 × 2–2.5 cm, dehiscence septicidal. Seeds dull black, thin.
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