Vascular Plants of the Gila Wilderness
Presented in Association with the
Western New Mexico University Department
of Natural Sciences
Ambrosia psilostachya A.P. de Candolle
(Western Ragweed, Perennial Ragweed)
Ambrosia psilostachya A.P. de Candolle var. lindheimeriana (Scheele) Blankinship
Ambrosia psilostachya grows as an erect branched stem with long lanceolate lobed or dentate leaves. It is a perennial that prefers dry wasteground and can grow in large stands. As in
other Ambrosia species, pistillate heads are in the axils of upper leaves.
Please click on an image for a larger file.
Ambrosia psilostachya, photo Russ Kleinman, Burro Mtns., Saddlerock Road
Ambrosia psilostachya, macro of staminate flowerheads, photo Russ Kleinman, Leggett Canyon, Aug. 27, 2009
Ambrosia psilostachya, macro of pistillate flowerhead in leaf axil, photo Russ Kleinman, Leggett Canyon, Aug. 27, 2009
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