26. Yucca tenuistyla Trelease, Rep. (Annual) Missouri Bot. Gard.
13: 53, plate 17, fig. 2, plates 18, 19, plate 83, fig. 3, plate
92, fig. 1. 1902. Plants forming open colonies, acaulescent or
short-caulescent; rosettes usually small. Stems erect, to 0.5 m.
Leaf blade mostly recurving, lanceolate, plano-convex, widest
near middle, 40–70 × 1–2 cm, rigid, margins entire, filiferous,
whitish, apex scarcely pungent. Inflorescences paniculate,
arising beyond rosettes, ovoid, to 10 dm, distance from leaf
tips to proximal inflorescence branches more than twice leaf
length when fully expanded, glabrous or slightly pubescent;
bracts erect; peduncle scapelike, 1–1.7 m, less than 2.5 cm
diam. Flowers pendent; tepals narrow, apex acute; filaments
shorter than pistil; pistil 1.5–3.8 cm; ovary white; style white
or green, oblong, often deeply lobed; stigmas lobed. Fruits
erect, capsular, dehiscent, cylindrical, symmetrical, not
constricted, stout, 5–6.5 × 2.5–3 cm, dehiscence septicidal.
Seeds glossy black, thin, 8–10 × 7–