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Basavaraj, I. & D. G. Krishnappa. 1983. Cytotaxonomic studies in South Indian members of the genus Pogostemon. Proc. Indian Sci. Congr. Assoc. 70(3–VI): 88–89.
Cherian, M. & P. I. Kuriachan. 1993. Cytotaxonomic studies of the subtribe Pogostemoninae sensu Bentham (Labiatae) from south India. Cytologia 58: 439–444.