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canyon bottom along Rio San Ignacio, on sloping coarse volcanic tuff gravels accumulated at base of western wall of canyon.
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plants on disturbed, silty, volcanic alluvium in roadside drainage swale running through a largely abandoned old village and agricultural area
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roadside in steeply sloping volcanic rhyolite tuff rubble at mid canyon. Sites along the old gravel switchback road have now been largely destroyed by a new paved highway to Batopilas that also greatly restricts access to many former rich roadside collecting sites in the canyon.
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Slo.: pasje zelisce
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on sandy volcanic soil of a gently sloping coastal plain.
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