Prodromus of a fern flora of Bolivia. XLII. Update I. Author Kessler, Michael Systematic and Evolutionary Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland. Author Smith, Alan R. University Herbarium, 1001 Valley Life Sciences Bldg. # 2465, University of California, Berkeley, CA 94720 - 2465. Author Øllgaard, Benjamin Department of Biology - Ecoinformatics and Biodiversity, Ny Munkegade 116, building 1137, 8000 Aarhus C, Denmark. Author Matos, Fernando B. Centro de Referência em Informação Ambiental (CRIA), Rua João Carlos do Amaral 500, 13070 - 111, Campinas, SP, Brasil. Author Moran, Robbin C. New York Botanical Garden, 2900 Southern Blvd., Bronx, New York, 10458 - 5126, USA. text Phytotaxa 2023 2023-12-20 630 3 183 210 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.630.3.2/51376 journal article 10.11646/phytotaxa.630.3.2 1179-3163 10409920 Elaphoglossum lindenii T.Moore, Index Fil. 360. 1862. = Elaphoglossum pilosius Mickel, Brittonia 39: 324. 1987 . Range: — Mexico to Bolivia (CO, LP), Brazil , and Chile (including Juan Fernández Isl.); perhaps also Tristan da Cunha ( Matos & Mickel 2018 ). Ecology: —Fairly common but local; saxicolous and terrestrial on rock faces, steep slopes, and road banks, in humid to semihumid habitats; 2900–4300 m . Notes: — Mickel (1987) described Elaphoglossum pilosius Mickel , based on several specimens from Venezuela ( Lara , Mérida , and Táchira ), and that name was subsequently recognized in the floras of Peru ( Mickel 1991 ), Mesoamerica ( Mickel 1995 ), Mexico ( Mickel & Smith 2004 ), and Bolivia (Kessler et al. 2018). In the protologue of E. pilosius , Mickel (1987) commented that his new species “is close to E. lindenii and sometimes even grows with it”. A few years later, Mickel (1991) mentioned that “ E. pilosius appears to be distinct from E. lindenii on the basis of its greater pubescence and rounded to truncate lamina base, but more extensive population samples are needed to settle the matter”. The two species, as recognized by those authors, overlap in distribution and are highly variable in blade shape and scale abundance. After examining numerous specimens from throughout their geographic range, we have come to the conclusion that E. lindenii and E. pilosius are the same.