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moist soil of roadside seeps along low road cut in pale volcanic rhyolitic tuff. Unfortunately this botanically rich habitat was recently destroyed by construction of a new paved highway to Batopilas
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Plants on hillside understory in semi-shaded openings on moderate west facing slope with volcanic rhyolitic tuff substrate
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Plants on hillside understory in semi-shaded openings on moderate west facing slope with volcanic rhyolitic tuff substrate
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base of boulders topping low ridge of volcanic rhyolitic tuff gravels.
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base of boulders topping low ridge of volcanic rhyolitic tuff gravels.
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on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek.
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pockets along upper edge of cliffs in outcrops volcanic tuff forming south rim of Rio Otereo canyon
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in pockets along upper edge of cliffs of exposed volcanic tuff forming south rim of Rio Otereo canyon
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