A synopsis of Meriania (Melastomataceae: Merianieae) in Peru Author Fernandez-Hilario, Robin 0000-0001-8234-9502 Programa de Pós-Graduação em Botânica, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531 - 970, Curitiba, PR, Brazil. & División de Ecología Vegetal - CORBIDI, Calle Santa Rita 105 Of. 2, Urb. Huertos de San Antonio Monterrico, Surco, Lima, Perú. & rfernandez @ corbidi. org; https: // orcid. org / 0000 - 0001 - 8234 - 9502 rfernandez@corbidi.org Author Goldenberg, Renato 0000-0002-7047-6720 Programa de Pós-Graduação em Botânica, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531 - 970, Curitiba, PR, Brazil. & renato. goldenberg @ gmail. com; https: // orcid. org / 0000 - 0002 - 7047 - 6720 renato.goldenberg@gmail.com Author Michelangeli, Fabián A. 0000-0001-7348-143X Programa de Pós-Graduação em Botânica, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531 - 970, Curitiba, PR, Brazil. & The New York Botanical Garden, Bronx, NY 104458 USA. & Programa de Pós-Graduação em Botânica, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531 - 970, Curitiba, PR, Brazil. & fabian @ nybg. org; https: // orcid. org / 0000 - 0001 - 7348 - 143 X Corresponding author: rfernandez @ corbidi. org & Programa de Pós-Graduação em Botânica, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531 - 970, Curitiba, PR, Brazil. fabian@nybg.org text Phytotaxa 2023 2023-07-12 602 1 1 101 http://dx.doi.org/10.11646/phytotaxa.602.1.1 journal article 10.11646/phytotaxa.602.1.1 1179-3163 8141984 27. Meriania sumatika Rob.Fern., R.Goldenb. & Michelang., Willdenowia 52(1): 63 (2022). Type :— PERU . Cusco : Prov. Urubamba, Dist. Machupichu, Santuario Histórico de Machupicchu y en Camino Inca , 2060 m , 13°09’10”S , 72°31’00”W , 14–22 Oct 1987 (fl., fr.), P. Núñez & J. Arque 8369 ( holotype : CUZ! [accession no. 15097]; isotypes: F! [accession no. 2028864], US! [barcode 02925646]). ( Figure 58 ). FIGURE 58. Meriania sumatika . A. Terminal fertile branch with inflorescence. B. Flower at anthesis, apical view. C. Leaf blade, abaxial view. D. Infructescence branch. E. Antepetalous stamen, lateral view, with detail of the dorso-basal appendage, frontal view (above). F. Antesepalous stamen, lateral view, with detail of the dorso-basal appendage, frontal view (above). G. Hypanthium and calyx in lateral view. A–C from W. Galiano et al. 6410 ; D–G from P. Núñez & J. Arque 8369. Drawing by Leticia Lajo (B). Comments:— This species differs from other Peruvian species of Meriania by the combination of 10-costate hypanthium (ridges up to 4.5 mm high in fruit, Fig. 58D ), calyx with large falcate dorsal projections ( 14.5–15.5 mm long) ( Fig. 58G ), spreading, reddish-purple corollas, large petals ( 46–55 mm long), dimorphic stamens, stamen connectives with two appendages, one descending dorso-basal appendage (laterally expanded in the antesepalous stamens, Fig. 58F ), and the other blunt ascending appendage. Among Peruvian species, M. sumatika most closely resembles M. vargasii but differs by the hypanthia shape (10-costate vs. terete), petal length ( 46–55 mm vs. 20–24 mm ), and anther length ( 14–16 mm vs. 9–12 mm ).A detailed comparison of M. sumatika with other related species can be found in Fernandez-Hilario et al. (2022) . Distribution and phenology:— Meriania sumatika is endemic to southern Peru and grows in montane forests at 1800–2950 m ( Fig. 21 ). It has been collected in flower in February, May and October, and in fruit in May, June and October. Specimens examined:— PERU . Cusco : Prov. Urubamba , Dist. Machupichu , Intipata , Santuario Histórico de Machu Picchu , 2950 m , 10 Feb 1990 (fl.), A . Cano et al. 2874 ( HUT !), Wiñay-Wayna , Machupichu , 2850–2900 m , 21 May 1991 (fr.), H . Dueñas 27 ( CUZ !), Microcuenca Wiñaywayna , Wiñaywayna-Intipunku , 2700 m , 13°10’23.04”S , 72°32’03.44”W , 24 Jun 2001 (fr.), R . Tupayachi et al. 4926 ( CUZ !), camino Inca , entre Wiñay Wayna e Intipunku , quebrada Wacraytambo , 2737 m , 13°10’42”S , 72°32’02”W , 24 May 2004 (fl., fr.), W . Galiano et al. 6410 ( CUZ !, NY !); Prov. La Convención , Dist. Santa Ana , Potrero , 1800 m , 13°53’56”S , 72°43’50”W , 27 May 2002 (fl. bud), I . Huamantupa et al. 2060 ( MO !, USM !) .