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Heterotheca sessiliflora var. bolanderioides Semple is serpentine soil endemic to the hill tops around San Francisco Bay. It is a member of subsp. echioides and is the only tetraploid taxon in the species.
Heterortheca sessiliflora ssp. bolanderioides, Semple 5670, Santa Cruz Co., California
Heterortheca sessiliflora var. bolanderioides, Semple 9339, Contra Costa Co., California
Heterortheca sessiliflora var. bolanderioides, Semple & Chmielewski 8919, California
Last update 19 May 2023 by J.C. Semple
© 2023 J.C. Semple, including all photographs unless otherwise indicated