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on low badland slopes and drainage rills in fractured gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Ariocarpus fissuratus, Echinocactus horizonthalonius, Nama havardii, Thymophylla acerosa, Dalea wrightii, Polygala macradenia, Nerisyrenia camporum.
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Aster abatus
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on low badland slopes and drainage rills in fractured gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Ariocarpus fissuratus, Echinocactus horizonthalonius, Nama havardii, Thymophylla acerosa, Dalea wrightii, Polygala macradenia, Nerisyrenia camporum.
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Aster abatus
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on low badland slopes and drainage rills in fractured gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Ariocarpus fissuratus, Echinocactus horizonthalonius, Nama havardii, Thymophylla acerosa, Dalea wrightii, Polygala macradenia, Nerisyrenia camporum.
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Aster abatus
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on low badland slopes and drainage rills in fractured gypseous, shaley Cretaceous limestone with Stenandrium barbatum, Amsonia longiflora, Ariocarpus fissuratus, Echinocactus horizonthalonius, Nama havardii, Thymophylla acerosa, Dalea wrightii, Polygala macradenia, Nerisyrenia camporum.
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Aster abatus
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Synonym:Machaeranthera orcuttii
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