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flat topped spineless succulent on an outwash plain of mixed alluvial gravels of pale limestone and reddish volcanic rhyolite. Scarcely rising above ground level, plant is easily overlooked, especially in dry season. Increasingly threatened by both commercial and private collection from the wild.
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hillside slope with calcareous gravels on over white blocky limestone outcrops. An exceptionally rich and diverse flora site less than 100 yards east of Coahuila state line.
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flat topped spineless succulent on an gently sloping plain of mixed alluvial gravels of pale limestone and reddish volcanic rhyolite. Scarcely rising above ground level, plant is easily overlooked, especially in dry season. Increasingly threatened by both commercial and private collection from the wild.
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hillside slope with calcareous gravels on over white blocky limestone outcrops. An exceptionally rich and diverse flora site less than 100 yards east of Coahuila state line.
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on low open hills of eroded exposures of gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Thymophylla acerosa, Xyloriza wrightii, Nama havardii, Polygala macrdenia, Nerisyrenia camporum, Anulocaulis leiosolenus.
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on low open hills of eroded exposures of gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Thymophylla acerosa, Xyloriza wrightii, Nama havardii, Polygala macrdenia, Nerisyrenia camporum, Anulocaulis leiosolenus.
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on low open hills of eroded exposures of gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Thymophylla acerosa, Xyloriza wrightii, Nama havardii, Polygala macrdenia, Nerisyrenia camporum, Anulocaulis leiosolenus.
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A few small, hard to see plants growing among the uplifted limestone soils in the EAstern part of the Park, near the Rio Grande.
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hillside slope with calcareous gravels on over white blocky limestone outcrops. An exceptionally rich and diverse flora site less than 100 yards east of Coahuila state line.
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