A pictorial account of some fieldwork conducted in 2007.
While we were in southern Tamaulipas we also looked at a population of Lophophora koehresii.
This species, despite its
resemblence to Lophophora williamsii, is not hallucinogenic.
Notice the Ariocarpus kotschoubeyanus growing to the upper left of the Lophophora koehresii in the upper left image?
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Cactus Conservation Institute