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 163382 10.11646/phytotaxa.568.1.3 87ddb879-1616-4e3b-8817-434b61fb0c60 1179-3163 7184245 23. Myrcia grandis McVaugh (1969: 114) . Type :— VENEZUELA . Amazonas : Rio Siapa , Casiquiare , Maguire et al. 37617 ( holotype : MICH [1109512]). ( Fig. 4 L-N) Trees to shrub 3- 7 m . Twigs glabrous. Leaves with petioles 4–6 mm long, glabrous, channeled; blades elliptic or lanceolate, 4–6 × 1.9–2.4 cm , glabrous, chartaceous or coriaceous, discolorous, more lustrous adaxially; glands not seen; base subacute or cuneate; apex acute or acuminate, often long acuminate; midvein adaxially impressed; lateral veins numerous and slightly visible, not arched, 15 to 20 pairs; intra-marginal vein 1 mm or less from the margin, margin flat. Inflorescence terminal or subterminal, panicle, pyramidal, flowers lax, the axis 4.2–6.6 cm long, pubescent, the indumentum whitish, the first branching 2.4–5.8 cm long; bracts lanceolate, 2–4 × 2 mm , pubescent, caducous before anthesis; pedicels 1 mm long, glabrous; bracteoles lanceolate, 1–2 × 1 mm , pubescent, caducous before anthesis; flower buds campanulate, 2–2.3 × 1.5 mm , not constricted above ovary; calyx-lobes free, four, orbicular, 0.5–1 mm , glabrous, not reflexed; ovary not seen. Immature fruits globose, 0.4–0.6 × 0.6–0.8 cm , glabrous, surface smooth. Note:— Myrcia grandis may be recognized by its elliptic or lanceolate leaves, which are more lustrous adaxially; the pubescent panicle; and the campanulate and glabrous calyx-lobes. This species is morphologically related to M . sylvatica from which it is distinguished by its glabrous leaves (vs. abaxially pubescent) with an adaxially impressed midvein (vs. adaxially sulcate). Distribution and habitat:— Known from Bolivia , Colombia , Guyana , Panamá , Venezuela and northeastern and northwestern Brazil (Amazonas, Maranhão , Pará, Rondônia and Roraima states) (POWO 2020, Flora do Brasil 2020 ). In Amazonian Maranhão , M . grandis was found growing on riversides. Phenology:— Flowering in December. Specimens examined:— BRAZIL . Maranhão : Pinheiro : Rio Alto Turiaçu , Nova Esperança , 100 m , 2°55’12” S , 45°45’ W , 01 December 1978 (fl.), J. Jangoux & R.P . Bahia 128 ( NY !) . Additional -sSpecimens examined:— BRAZIL . Amazonas : Igarapé Lobisomen , Rio Cuieras , 2°31’12” S , 60°15’ W , 22 July 1991 (fl.), S.A. Mori 21827 ( NY !) .