Locoweed

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Locoweed

Locoweed (pronunciation: loh-koh-weed) is a common name for several species of plants in the genera Astragalus and Oxytropis that are known to be toxic to livestock. The term "locoweed" is derived from the Spanish word "loco", meaning "crazy", and "weed", a common term for unwanted plants.

Etymology

The term "locoweed" is believed to have originated in the mid-19th century, from the Spanish word "loco" (crazy) and the English word "weed". This is in reference to the observed effects of the plant on livestock, which can exhibit erratic and "crazy" behavior after ingestion.

Description

Locoweeds are perennial plants that are native to the western regions of North America. They are characterized by their small, pea-like flowers and their ability to thrive in arid conditions. The plants contain a toxic alkaloid known as swainsonine, which is responsible for their poisonous effects.

Effects

When ingested by livestock, locoweed can cause a condition known as locoism. Symptoms of locoism can include weight loss, erratic behavior, impaired vision, and in severe cases, death. The toxic effects of locoweed are cumulative, meaning that animals can become poisoned over time through repeated exposure.

Related Terms

  • Astragalus: A genus of plants in the legume family, some species of which are referred to as locoweed.
  • Oxytropis: Another genus of plants in the legume family, also containing species referred to as locoweed.
  • Swainsonine: The toxic alkaloid found in locoweed.
  • Locoism: The condition caused by ingestion of locoweed.

External links

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