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among coarse gravels and boulders of rhyolitic tuff along creek bank
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among coarse gravels and boulders of rhyolitic tuff along creek bank
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Plants on open flat plain of a large bolson, in silty, slightly saline, calcareous clay soil, along the margin between a long abandoned agricultural area and undisturbed native scrub. Site is located just inside (ca. 50 m)the state line.
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Plants on reddish volcanic rhyolite of grassy mid-slope hillside with Bouteloua hirsuta, Dahilia scherffii, Salvia emaciata, Milla biflora
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Plants on reddish volcanic rhyolite of grassy mid-slope hillside with Bouteloua hirsuta, Dahilia scherffii, Salvia emaciata, Milla biflora
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Plants on reddish volcanic rhyolite of grassy mid-slope hillside with Bouteloua hirsuta, Dahilia scherffii, Salvia emaciata, Milla biflora
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in shady pine understory on low ridge of volcanic rhyolitic tuff gravels and coarse sands
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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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roadside in grassy, open clearing above arroyo on volcanic tuff substrate.
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mesic bottom of Canon Tararecua on volcanic tuff rubble on moist soils near extensive thermal springs flowing into Rio San Ignacio,