Yucca arkansana Trel.
Yucca, Arkansas yucca, softleaf yucca
The arkansas yucca is a native of North America.
Plants: Up to 2′ (60 cm), or up to 7′ (2.1 m) with the flower stalk. They usually lack a stem.
Leaves: 1–2′ (40–70 cm) long, wide at the base, narrowing toward the tips, like large grass blades, with white twisted wiry filaments. They are leathery, and bluish- to yellowish-green.
Flowers: The flowering spike is covered with numerous greenish-white or purplish urn-shaped hanging flowers, each with 3 petals.
Fruits: Seed capsules are dark brown.
Habitats: Open fields, edges of thickets on uplands.
Photo by Edith Bettinger, from the Lady Bird Johnson Wildflower Center Slide Library. 
See the Yucca page for a comparison with other yuccas.
Online References:
References:
Irish, Mary & Irish, Gary, Agaves, Yuccas and Related Plants: A Gardener’s Guide, Timber Press, 2000
Yucca angustissima Engelm. ex Trel. var. mollis Engelm.
5/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 2 × 1′ (62 × 41 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Liliopsida | Monocots (plants with a single seed leaf); includes the lily family |
| Subclass | Liliidae | Includes lilies, orchids, and many others |
| Order | Asparagales | A diverse group that includes asparagus |
| Family | Asparagaceae | Agaves, asparagus, hyacinths, and others |
| Genus | Yucca | Linnaeus mistakenly derived the genus name from the Carib word for (similar-appearing) cassava, yuca |
| Species | arkansana | Means “from Arkansas” |
Yucca arkansana description by Thomas H. Kent, not updated.
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