Taxonomic study of Myrtaceae in forest fragments in Amazonian Maranhão, Brazil Author Amorim, Gabriela Dos Santos Programa de Pós-graduação em Biologia Vegetal, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50670 - 901, Recife - PE, Brazil. Author Barbosa, Maria Regina De Vasconcellos Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, Cidade Universitária, Caixa Postal 5065, 58051 - 970, João Pessoa- PB, Brazil. Author Jr, Eduardo Bezerra De Almeida Departamento de Biologia, Universidade Federal do Maranhão, Cidade Universitária Dom Delgado, Av. dos Portugueses, 1966 - Vila Bacanga, 65080 - 805, São Luís - MA. Author Thomas, William Wayt 0000-0002-4996-536X Institute of Systematic Botany, New York Botanical Garden, 2900 Southern Boulevard, Bronx, 10458 - 5126, NY, United States. wthomas @ nybg. org; https: // orcid. org / 0000 - 0002 - 4996 - 536 X wthomas@nybg.org text Phytotaxa 2022 2022-10-11 568 1 27 60 http://dx.doi.org/10.11646/phytotaxa.568.1.3 journal article 10.11646/phytotaxa.568.1.3 87ddb879-1616-4e3b-8817-434b61fb0c60 1179-3163 7184245 20. Myrcia cuprea (O. Berg) Kiaerskou (1893: 95) . Basionym:— Aulomyrcia cuprea O. Berg (1857–1859: 77). Type:— BRAZIL . “Flor. Amazon. Insula Colares. In littore”, E.F. Poeppig 2937 ( lectotype designated by McVaugh [1969 , p. 290]: W [0033248] image) . ( Figs. 4 H-K, 5C-D) Trees or shrubs 3– 7 m . Twigs pubescent, the indumentum brownish-red. Leaves with petioles 5–7 mm long, pubescent, channeled; blades elliptic to broadly so, or oval, 3.8–6.7 × 3–5 cm , pubescent adaxially and densely pubescent abaxially, the indumentum brownish-red, chartaceous or coriaceous, concolorous; glands conspicuous; base rounded or cuneate; apex acute, rounded or obtuse; midvein adaxially impressed or flat; lateral veins visible, not arched, 8 to 12 pairs; intramarginal vein ca. 1 mm or less from the margin, margin flat. Inflorescence terminal or subterminal, panicle, pyramidal, flowers lax, the axis 3.6–6 cm long, pubescent, the indumentum brownish-red, the first branching 1.9–4 cm ; bracts lanceolate, 4 × 2 mm , pubescent, caducous before anthesis; pedicels 0.5–1 mm long, pubescent; bracteoles lanceolate, 0.5 × 2 mm , pubescent, caducous before anthesis; flower buds campanulate, 2–3 × 2 mm , not constricted above ovary; calyx-lobes free, five, orbicular, 0.5 × 1 mm , pubescent, not reflexed, persistent in the fruit; ovary 2-locular. Immature fruit globose, 0.6–0.8 × 0.4–0.6 cm , pubescent, surface smooth. Note:— Myrcia cuprea may be recognized by its leaves, which are elliptic to broadly elliptic, or oval, with brownish-red indumentum; campanulate flower buds; and globose fruits, which are pubescent and have a smooth surface. This species is morphologically related to M . guianensis from which it is distinguished by its pubescent branches and leaves (vs. glabrous), campanulate flower buds (vs. globose or obovate) and 2-locular ovary (vs. 3- locular). Distribution and habitat:— Known from French Guiana , Suriname and northeastern and northwestern Brazil (Amazonas, Amapá , Maranhão and Pará states) (POWO 2020, Flora do Brasil 2020 ). In Amazonian Maranhão , M . cuprea was found growing in secondary and “terra firme” forests. Phenology:— Flowering in May, July, August and November and fruiting in January. Specimens examined:— BRAZIL . Maranhão : Ao longo do rio. Rio Gurupi , 15 August 1958 (fl.), R.L. Fróes 34555 ( IAN !) . Anajatuba , 3°15’52” S , 44°37’11” W , 26 January 1976 (fr.), B.G.S. Ribeiro & G.S. Pinheiro 1228 ( IAN !) . Cândido Mendes , 1°26’49” S , 45°43’00” W , 02 November 2017 (fl.), G.S. Amorim 525 ( MAR !) ; Maracassumé River region , Ilha do Trauira , 1°12’52” S , 45°33’33” W , 31 August 1932 (fl.), R.L. Fróes 1842 ( NY !) . Cururupu , Faz. Sto Antonio , 1°49’42” S , 44°52’05” W , August 1914 (fl.), A. Lisboa 56 ( NY !) ; Perto do Palacete , 1°46’18” S , 44°53’23” W , 21 August 2014 (fl.), M.A. Machado 14 ( MAR !) . Maracassumé , Santa Helena. Próximo do Lugarejo Queimadas , 2°13’52” S , 45°17’59” W , 09 July 1978 (fl.), N.A. Rosa & O. Cardoso 2547 ( IAN !) . São Luís , Alumar , 2°41’30” S , 44°19’44” W , 13 November 1995 (fl.), K.B. Ferreira & E.C. Girnos s.c ( MAR !) ; Anil , Arredores da estiva. Sitio Andiroba , 06 August 1980 (fl.), M.G. Silva 5676 ( MG !) ; Granja Barreto , 03 September 1952 (fl.), R.L. Fróes 28549 ( IAN !) ; Granja Federal , 2°31’47” S , 44°18’10” W , 12 May 1949 (fl.), R.L. Fróes 24247 ( IAN !) ; Sítio Santa Eulália , 2°30’30” S , 44°16’39” W , 16 September 2017 (fr.), G.S. Amorim 399 ( MAR !) , G.S. Amorim 400 (MAR), G.S. Amorim 451 ( MAR !) ; 2°33’57” S , 44°18’51” W , 29 January 2018 (fr.), G.S. Amorim 428 ( MAR !) , G.S. Amorim 429 ( MAR !) ; Parque Ambiental Alumar , 2°41’31” S , 44°19’42” W , 07 September 1999 (fl.), G. Richardson s.n ( MAR !) . Reserva Florestal do Sacavém , 2°53’37” S , 44°30’28” W , 17 July 1992 (fl.), F.H. Muniz 141 (INPA, image) ; 2°34’04” S , 44°15’44” W , 30 August 1995 (fl.), J. Ferreira & E. Barroso 92 ( MAR !) .