herbaspirillum rhizosphaerae herbaspirillum rhizosphaerae herbaspirillum rhizosphaerae is a gram-negative mesophilic bacterium of the genus herbaspirillum isolated from rhizosphere soil of allium victorialis var. platyphyllum on ulleung island in korea. herbaspirillum rhizosphaerae scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: oxalobacteraceae genus: herbaspirillum species: h. rhizosphaerae binomial name herbaspirillum rhizosphaeraejung et al., 2007 type strain cip 108917, kctc 12558, lmg 24413, ums-37