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Recovery Strategy for the Western Spiderwort (Tradescantia occidentalis) in Canada – 2013

1. COSEWIC* Species Assessement Information

Date of Assessment: November 2002

Common Name (population): Western Spiderwort

Scientific Name: Tradescantia occidentalis

COSEWIC Status: Threatened

Reason for Designation: A perennial restricted to four disjunct sand dune habitats where the species is at risk from invading leafy spurge, cattle grazing, and dune stabilization.

Canadian Occurrence: Alberta, Saskatchewan and Manitoba

COSEWIC Status History: Designated Threatened in April 1992. Status re-examined and confirmed in November 2002.

* COSEWIC: Committee on the Status of Endangered Wildlife in Canada