United States, California, VENTURA, VENTURA, CA, US
Uncommon along open stream-bed in full sun. Growing in pure coarse sand. Sespe Creek, Santa Paula Range, altitude 1300 ft. A N Rood Collection #2521.
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ORIGINAL ID: Equisetum hyemale L. var. californicum Milde ANNO: Equisetum hyemale L. var. robustum (A. Br.) A. A. Eaton, A N Rood, no date; E. hyemale L. subsp. affine (Engelm.) Calder & Roy L. Taylor, M K Cooperrider (KE), January 1994