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annual in coarse calcareous sands of arroyo bottom in a 1/2 mile long, narrow, steep walled, dry, slot canyon cut in flat lying pale, blocky, limestone strata by a intermittent arroyo tributary of Fresnal Creek, and sheltering a richly diverse flora of the remote, poorly accessible region known as Hell's Half-acre.
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annual in coarse calcareous sands of arroyo bottom in a 1/2 mile long, narrow, steep walled, dry, slot canyon cut in flat lying pale, blocky, limestone strata by a intermittent arroyo tributary of Fresnal Creek, and sheltering a richly diverse flora of the remote, poorly accessible region known as Hell's Half-acre.
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annuals in habitat on disturbed limestone soil & gravels of graded road crossing an arroyo tributary of Fresnal Creek in remote Hells Half-acre region
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annuals on disturbed limestone soil and gravels mounded by occasionally grading of arroyo crossing a tributary of Fresnal Creek in remote Hells Half-acre region
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annuals in habitat on disturbed limestone soil and gravels mounded by occasional grading of arroyo crossing a tributary of Fresnal Creek in remote Hells Half-acre region
