sphingomonas cynarae sphingomonas cynarae sphingomonas cynarae is a gram-negative, non-spore-forming, rod-shaped and non-motile bacteria from the genus of sphingomonas which has been isolated from the phyllosphere of the plant cynara cardunculus var. sylvestris in lecce in italy. sphingomonas cynarae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: sphingomonadaceae genus: sphingomonas binomial name sphingomonas cynaraetalà et al. 2013 type strain item 13494, jcm 17498, spc-1 synonyms sphingomonas cardui