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open grassy undeveloped area on the outskirts of the city
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stout perennial root exposed in arroyo streambed of limestone gravels
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Pistillate flowers. Plants on grassy highway right-of-way in caliche soil
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Pistillate flowers. Plants on grassy highway right-of-way in caliche soil
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Pistillate flowers. Plants on grassy highway right-of-way in caliche soil
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Pistillate flowers. Plants on grassy highway right-of-way in caliche soil
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Staminate flowers. Plants on grassy highway right-of-way in caliche soil
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Staminate flowers. Plants on grassy highway right-of-way in caliche soil
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in road bed gravels along highway right-of-way on low hillside slope of white chalky limestone. Note pistillate flowers in leaf axils below the spike-like thyrse of staminate flowers held above the foliage
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in road bed gravels along highway right-of-way on low hillside slope of white chalky limestone
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in road bed gravels along highway right-of-way on low hillside slope of white chalky limestone. Note pistillate flowers in leaf axils below the spike-like thyrse of staminate flowers held above the foliage
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in road bed gravels along highway right-of-way on low hillside slope of white chalky limestone. View of pistillate flowers in leaf axils below the spike-like thyrse of staminate flowers held above the foliage
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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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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 roadside drainage swale below vertical roadcut cliff face, in mixed coarse limestone spall and roadbed base gravels and sands.
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