Melastomataceae in a continental Atlantic Forest island from southeastern Brazil Author Silva-Gonçalves, Kelly Cristina Da Programa de Pós-graduação em Ciências Ambientais e Florestais; Universidade Federal Rural do Rio de Janeiro; UFRRJ, Rodovia BR- 465, Km 7, 23.890 - 000, Seropédica, Rio de Janeiro, Brazil; E-mail: kellysilva 2010 @ yahoo. com. br & Author for correspondence Author Baumgratz, José Fernando A. Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão 915, 22.460 - 030, Rio de Janeiro, Brazil; E-mail: jbaumgra @ jbrj. gov. br Author Nunes-Freitas, André Felippe Departamento de Ciências Ambientais e Florestais, Universidade Federal Rural do Rio de Janeiro; UFRRJ, Rodovia BR- 465, Km 7, 23.890 - 000, Seropédica, Rio de Janeiro, Brazil; E-mail: afnfreitas @ gmail. com text Phytotaxa 2014 2014-10-17 183 2 61 92 http://dx.doi.org/10.11646/phytotaxa.183.2.1 journal article 10.11646/phytotaxa.183.2.1 1179-3163 5149548 6.1. Ossaea marginata ( Desrousseaux 1797: 32 ) Triana (1871: 147) . [ Figs. 3p–q , 9a–c ] Shrubs 1.3–1.7 m ; indumentum of the branches, petioles, inflorescences, hypanthium and calyx furfuraceous-stellulate and setose. Petioles 1.6–4.4 cm long; blade 10.6–19 × 3.2–5.9 cm , papiraceous, elliptic, base obtuse, apex acuminate, margin entire or crenulate, appressed-ciliolate; adaxial surface densely appressed-setulose in the marginal region, abaxial surface also furfuraceous-stellulate; acrodromous veins 5, the inner pair 5–15 mm suprabasal. Botryoid and metabotryoid 0.9–16 mm long, axillary, in leafy and/or aphyllous nodes; bracts 0.8–1 × 0.1–0.2 mm , bracteoles 0.8– 0.9 × 0.1–0.2 mm , both persistent, triangular, apex acuminate. Floral buds with apex acute to acuminate. Flowers 5-merous, pedicelate; hypanthium ca. 3 × 2.1–3 mm , campanulate; inner torus setulose, glabrescent; calyx persistent, bilobed, external lobes 3.5–5 × 0.5–1 mm , narrowly triangular, margin densely ciliolate, internal lobes 0.7–0.8 × 1.8–2 mm , short-triangular to ovate; petals 3–3.2 × 1–1.1 mm , white, narrowly triangular, apex acute to acuminate; stamens equal in size and shape, filaments ca. 2 mm long; anthers ca. 2 mm long, yellow, straight, pore terminal, connective not prolonged bellow the thecae, appendage dorsal, obsolete; ovary ca. 1 × 1–2 mm , 3/4- inferior, 4- celled, sparsely setulose; style ca. 6 mm long, glabrous. Baccate, bacidium type , 5.5–8 × 4.5–7 mm , purple-blackness, sparsely furfuraceous-stellulate and setose, polyspermous; seeds 0.8–1 × 0.1–0.3 mm , obtriangular. Specimens examined :— 23.XII.2005 , fl., fr., F.C. Nettesheim 162 ( RBR ) ; 12–13.X.2007 , fl., fr., K.C. Silva 18 (RB, RBR ) ; 12–13.X.2007 , fr., K.C. Silva 19 (RB, RBR ) ; 23.II.2008 , fr., K.C. Silva 28 (RB, RBR ) ; 9.I.2010 , fr., K.C. Silva 62 ( RBR ) . Distribution :—It occurs in Brazil , Argentina and Paraguay . In Brazil , it is found in the states of Mato Grosso do Sul , Minas Gerais , Espírito Santo , Rio de Jnaeiro, São Paulo , Paraná , and Santa Catarina , in Cerrado and Atlantic Forest Biomes ( Souza & Baumgratz 2012b ). Comments :—In Marambaia, this species occurs in Dense Sobmontane Ombrophuilous Forest. It can be distinguished by the axillary inflorescences at leafy and/or aphyllous nodes, the floral buds and petals with acute to acuminate apices, bilobed laciniate calyx, and the partly inferior ovary. Additional illustrations in Goldenberg et al. (2005) , and Souza (2009).