xanthomonas alfalfae xanthomonas alfalfae xanthomonas alfalfae is a species of bacteria. xanthomonas alfalfae scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: xanthomonadales family: xanthomonadaceae genus: xanthomonas species: x. alfalfae binomial name xanthomonas alfalfae(riker et al. 1935) schaad et al. 2007 type strain atcc 11765 synonyms xanthomonas perforans jones et al., 2006