Ryding (Elly Walther & K.H.Walther) 2007 - Ryding O (2007) Revision of the Micromeria (Labiatae) in tropical to southern Africa and on the Arabian Peninsula. Botanical Journal of the Linnean Society 155(3): 427-446. doi: 10.1111/j.1095-8339.2007.00702.x.
There is no corrections for Micromeria imbricata var. villosa yet.