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Yucca  filamentosa  'Golden Sword'

(Golden Adam's-needle Yucca)

Hardy evergreen shrub grows to 2+ ft. Creamy-yellow flower spike Drought tolerant. Sun. Zone 5-7

Yucca flaccida (Southwest Yucca)

White flowers 4-7 ft above bluish-green, 2 1/2 ft. long foliage. Zone 1-9. Sun and well-drained soil.