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Bursera forest on moderately sloping exposure of volcanic rhyolitic tuff at mid canyon with Ceiba acuminate (lower center). Agave shrevei v. magna, Pachycereus schottii
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on steep lower slope of exposed reddish volcanic rhyolitic tuff. Pale spring dry season bark reddens with summer rains. This site has been destroyed by a new paved highway to Batopilas that also limits easy access to many former rich roadside collecting sites in the canyon.
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on red volcanic rhyolitic tuff outcrop above river in lower canyon. This site is likely destroyed or no longer easily accessible due to construction of a new paved highway to Batopilas
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plants on steep slope of accumulated volcanic rhyolitic tuff rubble and alluvium of lower canyon in deciduous small tree forest with Heliocarpus, Acacia, Bursera, Celtis, Lysiloma.
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plants on steep slope of accumulated volcanic rhyolitic tuff rubble and alluvium of lower canyon in deciduous small tree forest with Heliocarpus, Acacia, Celtis, Lysiloma.
