Fauna
Plant

Great Plains Yucca

Yucca glauca

Also known as Small Soapweed, Soapweed Yucca, Spanish Bayonet

Forming dense spheres of stiff, fibrous leaves across the wind-scoured plains, Great Plains yucca survives extreme drought and subzero winter freezes through an expansive taproot network reaching several meters deep. Its creamy, bell-shaped summer blooms rely entirely on specialized yucca moths for pollination, exchanging a portion of developing seeds to nourish the moth larvae in an obligatory mutual partnership. Indigenous peoples historically pounded the saponin-rich rootstock into gentle soap and harvested the indestructible leaf fibers to weave sandals, baskets, and cordage.

Drought-TolerantSucculentEvergreen
Great Plains Yucca reference1 / 7
(c) Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman · cc-by-sa
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAutotrophic (photosynthesis)
Predators
  • Mule Deer
  • Pronghorn
  • Yucca Weevil
ThreatsOvergrazing, rangeland herbicide application, and agricultural conversion
HabitatsMixed-grass prairies, sandhills, badlands, and rocky slopes
Life span30–50+ years (clones can persist for centuries)
Classification
  1. OrderAsparagales
  2. FamilyAsparagaceae
  3. GenusYucca
  4. SpeciesYucca glauca
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Roots and foliage contain saponins toxic to dogs and cats; sharp leaf tips can cause puncture wounds.
Why it is dangerous
Contains steroidal saponins that cause vomiting, drooling, and diarrhea in domestic pets if chewed, while rigid spines can inflict deep punctures.
How to recognize a risky encounter
Look for low rosettes of pale bluish-green, needle-sharp leaves edged with curling white threads.
What to do
Keep curious pets away from plants and wear puncture-resistant gloves when weeding around the base.
Responsible observation
  • Puncture Hazard: Watch footing near low rosettes, as stiff leaf spine tips easily pierce lightweight footwear.
  • Nocturnal Viewing: Check night-blooming white flowers after dusk with a red light to spot active yucca moths.
  • Landscape Care: Provide sharply drained, sandy soil and unfiltered sun to prevent crown rot in cultivation.
Related species
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