Isocoma tenuisecta

Isocoma tenuisecta, commonly called burroweed, shrine jimmyweed, or burrow goldenweed is a North American species of small, flowering perennial herbs in the sunflower family. It is native to Arizona, New Mexico, and Sonora.[2][3]

Burroweed
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Isocoma
Species:
I. tenuisecta
Binomial name
Isocoma tenuisecta
Greene 1906
Synonyms[1]
  • Haplopappus fruticosus (Rose & Standl.) S.F.Blake
  • Haplopappus tenuisectus (Greene) S.F.Blake
  • Aplopappus fruticosus (Rose & Standl.) S.F.Blake
  • Aplopappus tenuisectus (Greene) S.F.Blake
  • Isocoma fruticosa Rose & Standl.

Isocoma tenuisecta grows 1 to 3 feet (30–90 cm) tall. Leaves are narrowly lance-shaped, with numerous large teeth or small lobes along the edges. The leaves are glandular and lobed. The plant flowers in September through November, with clusters of heads at the ends of branches and on top of the main stem. Each head contains 8-15 yellow disc flowers but no ray flowers. The old heads turn dry and tan and remain on the plant after the achenes have dispersed.[4]

Burroweed is poisonous to mammals,[5] including cattle, which can transfer the poison to humans through milk.[6]

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References
  1. The Plant List, Isocoma tenuisecta Greene
  2. Biota of North America Program 2014 county distribution map
  3. SEINet, Southwestern Biodiversity, Arizona chapter photos, description, distribution map
  4. Flora of North America, Isocoma tenuisecta Greene, 1906. Shrine jimmyweed , burroweed
  5. United States Food & Drug Administration, Poisonous Plants Database.
  6. Common Weeds of the United States. New York: Dover. 1971. p. 414. ISBN 0-486-20504-5.


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