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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite, long degraded by intensive grazing
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along roadside on flat, open playa bottom of bare, overgrazed, silty/clayey alkaline soil with widely scattered shrubby mesquite. Note appressed, forward facing (retorse), bristle-like (setose) hairs on obovate leaflets
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on limestone gravels at base of steam cut cliff face in large arroyo of Heath Canyon
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small sub-shrubby perennials in silty igneous soil and surface lag gravels on alluvial plain.
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along roadside drainage on limestone gravels. Plants in Big Bend region are often confused with S. durangensis but persistent sepals around immature fruit and a single series of fewer seeds help distinguish this species
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along roadside drainage on limestone gravels. Plants in Big Bend region are often confused with S. durangensis but persistent sepals around immature fruit and a single series of fewer seeds help distinguish this species
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along roadside on flat, open playa bottem of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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along roadside on flat, open playa bottem of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite,; long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; area long degraded by intensive grazing. SYN: Senna bauhiniodes var. pilosior
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roadside on open bolson playa flats of bare silty/clayey alkaline soil with widely scattered shrubby mesquite; area long degraded by intensive grazing.
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along roadside on flat, open playa bottom of bare silty/clayey alkaline soil with widely scattered shrubby mesquite, long degraded by intensive grazing.
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on mixed volcanic gravels on low erosional bajada from alluvial terrace above arroyo.
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on mixed volcanic gravels on low erosional bajada from alluvial terrace above arroyo.
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plants in calcareous gravels of a drainage swale between abandoned strip of pavement and base of gypseous limestone hillside at NW margin of the Sierra Parras with Anulocaulis eriosolenus, Peganum mexicana, Ditaxis neomexicana, Abutilon coahuilae. SYN: Senna bauhinioides var. pilosior
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