Yucca elata

Yucca elata
Large soaptree yucca
Scientific classification
Kingdom:Plantae
Clade:Angiosperms
Clade:Monocots
Order:Asparagales
Family:Asparagaceae
Subfamily:Agavoideae
Genus:Yucca
Species: Y. elata
Binomial name
Yucca elata
Natural range
Synonyms[1]
  • Y. angustifolia var. elata Engelm.
  • Yucca angustifolia var. radiosa Engelm.
  • Yucca radiosa (Engelm.) Trel.
  • Yucca verdiensis McKelvey

Yucca elata is a perennial plant, with common names that include soaptree, soaptree yucca, soapweed, and palmella.[2][3] It is native to southwestern North America, in the Sonoran Desert and Chihuahuan Desert in the United States (western Texas, New Mexico, Arizona), southern Nevada, southwestern Utah, and northern Mexico (Chihuahua, Coahuila, Sonora, Nuevo León).[4][5]

Description

This plant grows from 1.2-4.5 m tall, with a sparsely branched trunk. The trunk is brown, cylindrical in shape and has a small diameter and often has holes drilled by escaping yucca moth larvae. The leaves are arranged in a dense spiral whorl at the apex of the stems, each leaf 25–95 cm long and very slender, 0.2-1.3 cm broad. The white, bell-shaped flowers grow in a dense cluster on a slender stem at the apex of the stem, each flower 32–57 mm long, creamy white, often tinged pinkish or greenish.[6][7][8]

The soaptree yucca's fruit is a capsule 4–8 cm long and 2–4 cm broad, maturing brown in summer, when it splits into three sections to release the black seeds. They do not flower every year.[5]

Ecology

These plants fare best in dry, semi-desert conditions. They are very cold-hardy, but need lots of sunlight.[9]

Yucca elata in White Sands, New Mexico

Subspecies

There are three subordinate taxa are sometimes recognized, although sources differ as to whether these should be considered varieties or subspecies:[5][10]

  • Yucca elata ssp. elata. Capsules large, 5–8 cm; leaves long, 30–95 cm. Throughout the species' range.
  • Yucca elata ssp. verdiensis. Capsules small, 4-4.5 cm; leaves short, 25–45 cm. Arizona only.
  • Yucca elata ssp. utahensis.

Uses

Native Americans used the fiber of the soaptree yucca's leaves to make sandals, belts, cloth, baskets, cords, and mats, among other items. Inside the trunk and roots of the plant is a soapy substance high in saponins. In the past, this substance was commonly used as soap and shampoo, which was used to treat dandruff and hairloss. At least one tribe, the Zuni, used a mixture of soap made from yucca sap and ground aster to wash newborn babies to stimulate hair growth. The Apaches also use yucca leaf fibers to make dental floss and rope. In times of drought ranchers have used the plant as an emergency food supply for their cattle.

References

  1. ↑ "The Plant List: A Working List of All Plant Species".
  2. ↑ Common names of yucca species
  3. ↑ "Yucca elata". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 December 2017.
  4. ↑ Biota of North America Project, Yucca elata
  5. 1 2 3 Flora of North America: Yucca elata
  6. ↑ Fritz Hochstätter (Hrsg.): Yucca (Agavaceae). Band 1 Dehiscent-fruited species in the Southwest and Midwest of the USA, Canada and Baja California , Selbst Verlag, 2000. ISBN 3-00-005946-6
  7. ↑ Fritz Hochstätter (Hrsg.): Yucca (Agavaceae). Band 2 Indehiscent-fruited species in the Southwest, Midwest and East of the USA, Selbst Verlag. 2002. ISBN 3-00-009008-8
  8. ↑ Fritz Hochstätter (Hrsg.): Yucca (Agavaceae). Band 3 Mexico , Selbst Verlag, 2004. ISBN 3-00-013124-8
  9. ↑ Yucca plant care
  10. ↑ Tropicos, Yucca elata
Flowers
A dry opened seed pod of yucca elata, with some seeds remaining
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