Dorr, Laurence J. and Stergios, Basil. 2014. "Four new species of Andean Pilea (Urticaceae), with additional notes on the genus in Venezuela." Phytokeys, (42) 57–76. https://doi.org/10.3897/phytokeys.42.8455.
Four new species of Pilea (Urticaceae) from the Andes of Venezuela are described and illustrated: Pileamatthewii sp. nov., Pileamiguelii sp. nov., Pileanicholasii sp. nov., and Pileanidiae sp. nov. The affinities of these species and their positions within the informal classifications of Pilea proposed by Weddell and Killip are discussed. Notes on other species of Pilea found in Venezuela also are presented.
