Trunk 7-8 ft. long, twice forked; branchlets short, thick, spreading. Leaves densely rosulate, ensiform from a dilated base, 1½-2 ft. long, under 1 in. broad low down, narrowed gradually to the tip, very thick and rigid, smooth on the margin, rounded on the back in the lower half, keeled upwards, triquetrous towards the apex. Panicle shortly peduncled, very compound, about 1 ft. long; branchlets glabrous; pedicels many in a cluster, ⅛-⅙ in. long, articulated at the middle; bracts ovate-lanceolate, minute. Perianth ¼ in. long; tube nearly obselete. Stamens shorter than the perianth. -- Scheweinf. in Bull. Herb. Boiss. ii. App. ii. 76; Baker in Hoork. Ic. t. 2539.