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Great Basin Naturalist Memoirs

Abstract

At a site near Rock Valley, Nevada, dominated by volcanic rocks, both Larrea tridentata (Sesse & Moc. ex DC.) Cov. and Lycium andersonii A. Gray were restricted in distribution. Larrea tridentata did not grow in the many small washes in the area, but L. andersonii grew only in the washes. Ambrosia dumosa (A. Gray) Payne was more dense and more dominant in wash areas than in nonwash areas.

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