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in habitat: closed sandy drainage swales on gentle slope of exposed rhyolitic tuff with Calochortus, Drymaria effuse & grasses
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Slo.: predalpska grebenusa
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low clumping perennial in calcareous-gypseous silty clay soils at road side on desert creosote flats.
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roadside grasses and forbs
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Slo.: zanjevec
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Plants on vertical north face of roadcut in blocky Cretaceous limestone with Penstemon baccharifolius, Heterotheca viscida, Lantana achyranthifolia, Fraxinus greggii, Diospyros texana,Senna lindheimeriana,Gaura calcicola, Karwinskia humboldtiana,Cardiospermum corindum
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among of lower canyon rubble of volcanic tuffaceous gravels & boulders
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small, erect stemmed, herbaceous plants with acicular foliage nestled among large rocks at the edge of a broad, gravelly ridge of platy Cretaceous limestone and shale.
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weathered volcanic tuffaceous soil on undulating plateau between Barranca Urique and Batopilas, elev. 6673'.
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open grassy bottomland above Rio Papigochic tributary. Volcanic tuffaceous alluvium
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closed sandy drainage swales on gentle slope of exposed rhyolitic tuff
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low clumping perennial in calcareous-gypseous silty clay soils at road side on desert creosote flats.
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perennial plant with Tiquilia hispidissima on grayish crust of weathered gypsum over anhydrite and calcareous shaley limestone substrate of the Permian Castile Formation.
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Slo.: zanjevec, zajcki