Toxic Parts:
Flower Color:
  • flower color
  • flower color
haybales, meadows

Time of Greatest Risk


Geographical Distribution

Hairy vetch distribution - United States

Related Species

Hairy Vetch

Vicia villosa

Common Vetch, Narrow Leafed Vetch, Purple Vetch, Broad Beans
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Hairy vetch (Vicia villosa)is an annual, biennial, or rarely perennial, trailing or climbing legume. V. villosa is found throughout all 50 states in the United States and in other temperate climates worldwide. It is cultivated for its use as a pasture grass and cover crop. It's leaves consist of 10-20 narrowly oblong to linear-lanceolate leaflets, with branched tendrils. The stems and leaves of V. villosa are usually covered with soft woolly fuzz. It produces clusters of 10-40 purple flowers and flattened, elongated, green seedpods containing round black seeds.

Hairy Vetch Toxic Components

V. villosa is capable of accumulating large amounts of dry matter, nitrogen and cyanogenic glycosides. It has also been associated with systemic granulomatous disease (SGD) in horses and vetch toxicosis in cattle. Between 50 and 100% of these animals develop progressive debilitation and die with multisystemic infiltrative granulomatous inflammation.


  • Weight Loss
  • Coat Loss
  • Crusting And Scaling Of The Skin Over Most Of The Face
  • Seborrhea
  • Small Subcutaneous Nodules
  • Enlarged Lymph Nodes
  • Conjunctivitis