A mere 10 plant taxa have been recorded from San Benedicto, containing mainly herbs and grasses, with the occasional subshrubs and vines. It does not appear that any became extinct due to the 1952 eruption. The local plant life contains several Revillagigedo endemics shared with Clarión: Bulbostylis nesiotica, Cyperus duripes and Perityle socorrosensis. The taxonomic status of the local Euphorbia anthonyi is not fully resolved. Other plants on San Benedicto are Aristolochia islandica, Cenchrus myosuroides, Eragrostis diversiflora, Erigeron crenatus, Ipomoea pes-caprae subsp. brasiliensis and Teucrium townsendii.
