knowlton's cactus

Noun
  1. Small clustering cactus of southwestern United States;
    A threatened species (synset 111871387)
    is a type of: cactus - any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines
    belongs to: genus pediocactus, pediocactus - low-growing cacti of the Great Plains of North America
    same as: pediocactus knowltonii

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