Scientific: Yucca recurvifolia (syn. Yucca gloriosa var. recurvifolia)
Common: curve leaf yucca, pendulous yucca
Family: Asparagaceae (subfamily Agavoideae)
Origin: Southeastern United States, Georgia, though some claim this is a southeast US hybrid and has no native range.

Pronounciation: YUK-ka re-cur-vi-FOL-ee-a

Hardiness zones
Sunset
7-10, 12-24
USDA 7-11

Landscape Use: Accent, border, focal point, oasis landscape plantings, container plant, shade gardens.

Form & Character: Upright and spreading, Spanish architecture, less obtrusive than other yuccas.

Growth Habit: Evergreen perennial, semi-woody, quite slow to 6 to 10 feet, mostly without branches, but some will branch once or twice with age.

Foliage/texture: Strap-shaped leaves, 2 to 3 feet in length, slightly glaucous and pendulous, flexible, sometimes tinged with red; coarse texture.

Flowers & fruits: White flowers grown in clusters on 3 to 5 feet flower stalks; fruits multicarpulate, seeds black.

Seasonal color: White in May in Phoenix, June elsewhere. Often repeats flowering in early fall.

Temperature: Tolerant, hardy to 0oF.

Light: In Phoenix, partial shade is best, full sun often yellows foliage. Avoid western exposures.

Soil: Tolerant, but well-drained soils result in better performance.

Watering: Thrives with regular water in a well-drained soil.

Pruning: Only remove dead leaves. Recent "trends" are to "skin" this plant like it's some miniature Mexican fan palm - quite the odd horticultural practice.

Propagation: Seed, short stem cuttings.

Disease and pests: Spider mites when folaige is chronically dusty.

Additional comments: This is a mesic yucca that prefers a little break from the hot western summer afternoon sun. It's surprisingly cold tolerant and is grown as an ormamental in even Europe. Here's an image of curve leaf yucca growing in an Orthodox monastery in Tryon, Bulgaria. And here it is used as a landscape shrub in a sidewalk planter along a street in Kjardali, Bulgaria.

Clones and Hybrids:
Yucca recurvifolia marginata (yellow edge).
Yucca recurvifolia glauca
Yucca recurvifolia variegata
Yucca recurvifolia ' Dolomiten '
Yucca recurvifolia ' Schwarzwald '
Yucca recurvifolia 'Grubenlampe '
Yucca recurvifolia ' Lothringen '
Yucca recurvifolia ' Rheintal '