Omphalotus olivascens var. indigo var. nov. is described from Baja Cal
ifornia (Mexico). This new taxon differs mainly from the type-varity i
n Its blue flesh, very apparent when cut; this colour is kept in exsic
cata and is lacking in all the previously taxa described in Omphalotus
, e,g. O. olearius, O. illudens and O. subilludens.