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Geyer's sandmat

Scientific Name: Chamaesyce geyeri

Family: Euphorbiaceae

Category: Dicot

Growth: Forb/herb

Duration: Annual

Other Names:

       

Chamaesyce geyeri: Geyer's Sandmat

Chamaesyce geyeri, commonly known as Geyer's sandmat or Geyer's spurge, is a fascinating annual forb/herb belonging to the spurge family.

Taxonomy and Nomenclature

  • Scientific Name: Chamaesyce geyeri (Engelm. & A. Gray) Small
  • Family: Euphorbiaceae (Spurge Family)
  • Kingdom: Plantae
  • Taxonomic Rank: Species
  • Synonyms:
    • Euphorbia geyeri Engelm.
    • Chamaesyce geyeri (Engelm.) Small
  • Subordinate Taxa:
    • Chamaesyce geyeri (Engelm. & A. Gray) Small var. geyeri
    • Chamaesyce geyeri (Engelm. & M.C. Johnst.) Mayfield var. wheeleriana (Warnock & M.C. Johnst.) Mayfield
  • Taxonomic Rank: Variety (for subordinate taxa)

Common Names

  • Geyer's sandmat
  • Geyer's spurge
  • Geyer's broomspurge

Morphological Characteristics and Growth Habits

  • Geyer's sandmat is typically a prostrate annual plant.
  • It is a glabrous plant, meaning it lacks hairs.
  • Plants are generally less than 3 cm tall.
  • It often spreads out along the ground.
  • Described as a mat-forming plant.

Distribution and Habitat

  • Found in LA, OK, and NM.

Traditional Uses

  • The Lakota people traditionally used Chamaesyce geyeri as a medicine for head protection.

Further Information

  • Discover Life offers a page about the biology, natural history, ecology, identification, and distribution of Chamaesyce geyeri.
  • Learn more about sandmat plants on Garden Guides.
  • Photos and information are available about Minnesota flora, including Geyer's spurge.