Malacothamnus mendocinensis is a species of flowering plant in the mallow family known by the common name Mendocino bushmallow.

[1] It is endemic to Mendocino County, California, where it is known from only two populations.

[2] It was presumed extinct until rediscovered in 2016 and now has a California Rare Plant Rank of 1B.1 (Plants rare, threatened, or endangered in California and elsewhere).

[4][5][6] Phylogenetic and morphological evidence, however, indicate that it is not closely related to these species and should be recognized as a separate species.

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