nocardia alni nocardia alni nocardia alni is a species of bacteria from the genus nocardia that has been isolated from the root nodules of alnus glutinosa. nocardia alni scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: nocardiaceae genus: nocardia species: n. alni binomial name nocardia alninouioui et al. 2022 type strain cect 30122dsm 110931ncl2