A taxonomic revision of the genus Eperua (Leguminosae, Detarioideae, Detarieae) Author Fortes, Elenice A. Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Rua Monteiro Lobato, 255, Campinas, São Paulo, Brazil, 13083 - 862. forteselenice @ gmail. com; https: // orcid. org / 0000 - 0001 - 8307 - 6534 forteselenice@gmail.com Author Dos, Ilka P. Programa de Pós Graduação em Ciências Biológicas, área de concentração Botânica Tropical, Universidade Federal Rural da Amazônia e Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Terra Firme, Belém, Pará, Brasil, CEP 66077 - 83 o. ilkapreis @ gmail. com; https: // orcid. org / 0009 - 0001 - 2511 - 2821 ilkapreis@gmail.com Author Steege, Hans Ter Naturalis Biodiversity Center, Leiden, The Netherlands; hans. tersteege @ naturalis. nl; https: // orcid. org / 0000 - 0002 - 8738 - 2659 & Quantitative Biodiversity Dynamics, Dept. of Biology, Utrecht University, Utrecht, The Netherlands hans.tersteege@naturalis.nl Author Aymard, Gerardo UNELLEZ-Guanare, Programa de Ciencias del Agro y del Mar, Herbario Universitario (PORT), Mesa de Cavacas, estado Portuguesa, Venezuela, 3350; gerardo. aymard @ gmail. com; https: // orcid. org / 0000 - 0001 - 9405 - 0508; & Compensation International Progress S. A. Ciprogress-Greenlife, Bogotá D. C., Colombia gerardo.aymard@gmail.com Author Secco, Ricardo De S. Museu Paraense Emilio Goeldi - MPEG Museu Paraense Emílio Goeldi / Universidade Federal Rural da Amazônia, Programa de Pós-Graduação em Ciências Biológicas - Botânica Tropical, Belém, Pará, Brazil, 66077 - 830 rsecco @ museu-goeldi. br; https: // orcid. org / 0000 - 0002 - 3295 - 7929 rsecco@museu-goeldi.br Author Martins-Da-Silva, Regina Célia V. Empresa Brasileira de Pesquisa Agropecuária, Embrapa Amazônia Oriental, Laboratório de Botânica, Trav. Enéas Pinheiro, s / n, Marco, CEP 66095 - 903 Author Mansano, Vidal F. Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Rua Monteiro Lobato, 255, Campinas, São Paulo, Brazil, 13083 - 862. forteselenice @ gmail. com; https: // orcid. org / 0000 - 0001 - 8307 - 6534 & Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, RJ, Brazil, 22460 - 030 vidalmansano @ gmail. com; https: // orcid. org / 0000 - 0002 - 7204 - 0744 * Corresponding author & Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Rua Monteiro Lobato, 255, Campinas, São Paulo, Brazil, 13083 - 862. forteselenice @ gmail. com; https: // orcid. org / 0000 - 0001 - 8307 - 6534 forteselenice@gmail.com text Phytotaxa 2023 2023-09-28 617 1 1 127 http://dx.doi.org/10.11646/phytotaxa.617.1.1 journal article 10.11646/phytotaxa.617.1.1 1179-3163 8389766 9c. Eperua grandiflora subsp. ciliata E.A. Fortes & Mansano, subsp. nov. ( Figures 9 , 35 , 36 , 37 ) Type:— GUYANA . Potaro-Siparuni , Potaro River below Waratuk Falls , 107 m elev., 5°16’57”N 59°21’39”W , 05 September 2006 , Redden K . M . et al. 4029 ( holotype US [00963900]!). Diagnosis: — Eperua grandiflora subsp. ciliata shares with other subspecies of E. grandiflora the free stipules, 2–3- jugate leaves, and persistent bracteoles attached to the higher portion of the pedicels or at the base of the hypanthium. It also shares irregularly villous sheath, and glabrous ovary and fruits with subsp. grandiflora . Eperua grandiflora subsp. ciliata differs from other subspecies by the glabrous inflorescences, pedicel, hypanthium, and sepals (vs. with indumentum in subsp. grandiflora and subsp. guyanensis ), bracts and bracteoles glabrous with ciliate margin (vs. with indumentum in subsp. grandiflora and subsp. guyanensis ), and larger [4.7–5.6 × 3.8–5.9 mm ] bracteoles (vs. smaller [1.3–3.9 × 1.5–3.7 mm ] in subsp. grandiflora and subsp. guyanensis ). Leaves , margin flat. Inflorescences glabrous; bracts glabrous, ciliate; bracteoles 4.7–5.6 × 3.8–5.9 mm , glabrous, ciliate; pedicel glabrous; buds , glabrous. Flowers : hypanthium, sepal glabrous; stamens , sheath irregularly villous; ovary glabrous. Legumes glabrous. Phenology:— Flowering in September. Distribution:— Potaro River in the Esequibo River basin ( Guyana , Potaro-Siparuni ). It is sympatric with E. jenmanii , which also occurs in the same basin. Habitat:— It occurs in floodplain (riparian) forests, and wallaba forests, on white sand soils from 107 to 498 m elev. Occurrence in protected areas:— Kaieteur National Park ( Guyana ). Etymology:— The specific epithet relates to its ciliate bracts and bracteoles. Vernacular names:— unknown Uses:— unknown. Taxonomic notes:— Eperua grandiflora subsp. ciliata is known by only three specimens which shows some sympatry with E. grandiflora subsp. guyanensis . In the upcoming phylogeny of the genus E. grandiflora subsp. ciliata was sampled with one accession that appears as a sister group to the other two subspecies of E. grandiflora (Fortes et al. in prep.). This lineage grouping the three subspecies of E. grandiflora received maximum phylogenetic support. Specimens examined ( paratype ):— GUYANA . Cuyuni-Mazaruni , Pakaraima Mts. , Mazaruni River , trail approx. 0.8 miles North from mining camp, 570 m ele., 6°5’4”N 60°39’2”W , 21 February 2004 , Redden K . M . et al. 2059 (NY[03777031] image!, US [01952126]!). Potaro-Siparuni , Tukeit Landing below Kaieteur Falls on Potaro River , 498 m elev., 5°12’16”N 59°27’11”W , 02 September 2006 , Redden K . M . et al. 3962 (CAY[109805] image!, US[00963896]!).