A monograph of the genus Polylepis (Rosaceae) Author Boza Espinoza, Tatiana Erika https://orcid.org/0000-0002-9925-1795 Institute for Nature, Earth and Energy (INTE), Pontificia Universidad Catolica del Peru (PUCP), Av. Universitaria 1801, Lima 15088, Peru tatianaerika@gmail.com Author Kessler, Michael https://orcid.org/0000-0003-4612-9937 Department of Systematic and Evolutionary Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland text PhytoKeys 2022 2022-08-01 203 1 274 http://dx.doi.org/10.3897/phytokeys.203.83529 journal article http://dx.doi.org/10.3897/phytokeys.203.83529 1314-2003-203-1 001CD6EE01E8575F81AC9EFDD0599077 Subsection Besseria T.Boza & M.Kessler sect. nov. Diagnosis. Trees; 1-2(-3) lateral leaflet pairs; lower leaflet surfaces with a dense layer of very short, white pannose hairs sometimes mixed with long tomentose hairs; fruits with 2-5 irregular flattened ridges with a series of spines, sparsely to densely tomentose or villous. Type . Polylepis besseri Hieron. Note. The subsectional epithet Besseria is a noun in apposition.