An introduced plant that can be abundant in low, wet areas in northwestern New Mexico.
The achenes become bur-like with maturity. The genus is often placed in synonymy with
Plant habit north of Lumberton, New Mexico, 8 May 2007.
Plant habit along the San Juan River downstream of Navajo Lake, 4/30/06.
A flower along the San Juan downstream of Navajo Lake, 4/30/06.
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