Flower-clusters usually sessile, or short-stalked. Fruit pendulous, with thick succulent flesh; seeds thick; albumen ruminate. Segments of the perianth slightly united at the base. Panicle glabrous or puberulous. Ovary stipitate; leaves sharply toothed on their horny margins, smooth, dark green, slightly concave. 1. Y. aloifolia (C). Ovary sessile. Leaves concave, blue-green, rough on the lower surface. 2. Y. Treculeana (E). Leaves concave above the middle, light yellow-green, smooth. Style elongated. 3. Y. macrocarpa (E, H). Style short. 4. Y. mohavensis (G, H). Panicle coated with hoary tomentum; leaves concave, smooth, light yellow-green. 5. Y. Schottii (H). Segments of the perianth united below into a narrow tube; leaves flat, smooth, dark green. 6. Y. Faxoniana (E). Fruit erect or spreading, the flesh becoming thin and dry at maturity; seeds thin; albumen entire. Leaves rigid, concave above the middle, blue-green, sharply serrate. 7. Y. brevifolia (F, G). Leaves thin, flat or concave toward the apex, nearly entire, rough on the lower surface, dull or glaucous green. 8. Y. gloriosa (C). Flower-clusters long-stalked; fruit capsular, erect, finally splitting between the carpels and through their backs at the apex; seeds thin; albumen entire; leaves thin, flat, filamentose on the margins, smooth, pale yellow-green. 9. Y. elata (E, H). 1. Yucca aloifolia L. Spanish Bayonet. [Illustration: Fig. 106]