Yucca angustissima var. angustissima
Family: Asparagaceae
narrowleaf yucca
Yucca angustissima var. angustissima image
Photo ©Al Schneider, swcoloradowildflowers.com  

Plants acaulescent or caulescent. Stems procumbent, 0.1-0.4 m. Leaf blade narrow, long-tapering and primarily flat or concave distally, 25-45 × 0.5-0.8 cm, mostly flexible, smooth adaxially and abaxially. Inflorescences racemose, 8-10 dm, glabrous; peduncle 0.3-0.5 m. Flowers 4.5-5.5 cm; tepals pale green, often tinged rose or rosy purple; filaments 0.7-2.5 cm; anthers 3.2 mm; pistil 2.5-2.8 cm; style 10-13 mm. Capsules often deeply constricted near center, 3.5-5(-5.7) cm.

Flowering spring--early summer. Sandy places, sandstone outcrops, rocky hillsides of deserts; 900--2200 m; Ariz., N.Mex., Utah.

Yucca angustissima var. angustissima image
Photo ©Al Schneider, swcoloradowildflowers.com  
Yucca angustissima var. angustissima image
Photo ©Al Schneider, swcoloradowildflowers.com