1974, Daniel J. Foley, Herbs for Use and for Delight: An Anthology from The Herbarist (page 89)
Very aromatic; all culinary menthas can be used for sauces, jellies, and candied leaves.
1976, Agriculture and Agro-industries Journal (volume 9, page 19)
In the plots where black peppermint were planted as inter-row crop, there were 4 rows of Citronella or other menthas with alternate rows of black peppermint.