|Yucca flaccida, Royal Botanic Garden, Madrid|
Yucca flaccida, commonly called Adam's needle or weak-leaf yucca, is a species of flowering plant in the asparagus family (Asparagaceae). It is native to south-central and southeastern North America, from the lower Great Plains eastward to the Atlantic seaboard in Virginia, south through Florida and the Gulf states. It is a stemless evergreen shrub growing to 55 cm (22 in) tall by 150 cm (59 in) broad. It has a basal rosette of sharply pointed, swordlike leaves up to 55 cm (22 in) long. In summer, 150 cm (59 in) long panicles of bell-shaped creamy white flowers are held above the foliage.
The Latin specific epithet flaccida means "weak", "feeble", referring to the leaves which often fold under their own weight (the inner leaves may remain erect as they are supported by the outer ones).
It is cultivated and valued as an architectural plant. Numerous cultivars are available, some with variegated leaves, of which 'Golden Sword' and 'Ivory' have gained the Royal Horticultural Society's Award of Garden Merit.
Yucca flaccida can be identified by its pubescent inflorescence branches
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- Tropicos, Yucca flaccida
- "Flora of North America (FNA) - Yucca flaccida". Retrieved 17 May 2013.
- "Yucca flaccida". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 8 August 2015.
- Kew World Checklist of Selected Plant Families
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- "RHS Plant Selector - Yucca flaccida 'Golden Sword'". Retrieved 10 June 2013.
- "RHS Plant Selector - Yucca flaccida 'Ivory'". Retrieved 10 June 2013.
- "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 108. Retrieved 10 March 2019.
- Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".