wilsoniana wilsoniana wilsoniana is a genus of plant-parasitic oomycetes segregated from albugo. the name is in honor of the american mycologist g.w.wilson wilsoniana w. portulacae on portulaca oleracea scientific classification kingdom: chromista phylum: oomycota order: albuginales family: albuginaceae genus: wilsonianathines type species wilsoniana portulacae(dc. ex duby) thines drechsler (1935)