Melastomataceae in the Reserva de Desenvolvimento Sustentável do Tupé, Amazonas, Brazil Author Corrêa, André Luis Author Scudeller, Veridiana Vizoni Author Goldenberg, Renato text Phytotaxa 2017 2017-09-29 323 2 101 127 http://dx.doi.org/10.11646/phytotaxa.323.2.1 journal article 10.11646/phytotaxa.323.2.1 1179-3163 13696786 18. Miconia argyrophylla De Candolle (1828: 181) . Treelet or tree 3.1–6.8 m tall. Light gray rhytidome. Branches erect, quadrangular, not winged, rufous; branches, leaves abaxial surface, inflorescences, bracts, bracteoles, hypanthium and fruits with arachnoid persistent trichomes. Leaves opposite, isophyllous; petioles striate 2.1–3.5 cm long; leaf blades 24–28.2 × 8.2–11.6 cm , chartaceous, discolored, elliptical, base cuneate or rounded, apex acuminate, margins entire or serrate, not ciliate, adaxial side glabrous, leaf veins 5, basal, ant domatia absent. Paniculate Scorpioid ca. 15.1 × 6.2 cm , terminal; bracts ca. 1.4 mm long, lanceolate, caducous; bracteoles ca. 0.3 mm long. Flowers 5-merous, sessile; hypanthium ca. 1.7 mm long, oblong, striate; calyx simple, persistent; petals ca. 2.3 × 1.2 mm , white, obovate, symmetrical, apex rounded, base attenuate, margins ciliate; stamens 10, heteromorphic, smaller anthers ca. 2.3 mm , larger anthers ca. 3.1 mm long, yellow, oblong, straight, apex truncate,1 apical pore, connective not prolonged, smaller filaments ca. 1.7 mm , larger filaments ca. 2.3 mm long, glabrous; ovary ca. 0.8 mm long, half-inferior, placentation axillary, 3-locular, with simple trichomes; style ca. 5.2 mm long, straight, glabrous. Berry ca. 4.3 × 6.5 mm , unripe fruit green and orange, ripe fruit blackish; seeds numerous, triangular. Specimens examined:— BRAZIL . Amazonas , Manaus , RDS-Tupé, 15 August 2012 , fl., A . L . Corrêa 35 ( EAFM !, HUAM !, INPA !) ; 15 August 2012 , fl., A . L . Corrêa 36 ( EAFM !, HUAM !, INPA !) ; 15 August 2012 , bot., A . L . Corrêa 38 ( EAFM !, HUAM !, INPA !) ; 15 August 2012 , fr., A . L . Corrêa 43 ( EAFM !, HUAM !, INPA !) ; 02 November 2012 , fr., A . L . Corrêa 94 ( EAFM !, HUAM !, INPA !) . Distribution and habitat:— Colombia , Venezuela , Trinidad and Tobago , Guyana , Suriname , French Guiana, Peru and Bolivia ( Goldenberg et al. 2013 ). In Brazil it occurs in Amazonian forests ( Goldenberg & Caddah 2015 ). In the reserve, it occurs on second growth plateaus of “terra firme” forest. Comments:— This s pecies is frequent in the reserve. It can be distinguished by the striate, light gray rhytidome, quadrangular branches, and leaves with ciliate margins and abaxial leaf surface with arachnoid trichomes.