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 34. Myrciaria floribunda (H. West ex Willd.) O. Berg (1854–1856: 330) . Basionym:— Eugenia floribunda H. West ex Willdenow (1799: 960) . Type:— UNITED STATES . Virgin Islands , Ins. St. Crucis [ St. Croix ], M. Vahl s.n. ( HAL [0089630], image) . Trees 3– 4 m . Twigs puberulent, the indumentum whitish. Leaves with petioles 2–4 mm long, puberulent, unchanneled; blades elliptic or lanceolate, 4.4–7.3 × 2.8–3 cm , glabrous, membranaceous, concolorous; glands not seen; base cuneate; apex long acuminate; midvein adaxially flat, sometimes prominent; lateral veins inconspicuous; intra-marginal vein 1 mm or less from the margin, margin flat. Inflorescence glomerules clustered in axils, the axis inconspicuous; bracts not seen, caducous before anthesis; pedicels absent; bracteoles orbicular, ca. 0.5 × 0.5 mm , glabrous, caducous after anthesis; flower buds ovate, 1.5 × 1.5 mm , not constricted above ovary; calyx-lobes free, four, glabrous, ovate, 1–1.5 × 1 mm , not reflexed; the fruit falling together with the calyx, corolla and hypanthium; ovary not seen. Immature fruit globose, 0.5–0.7 × 0.5–0.9 cm , glabrous, surface with glands marked. Note:— Myrciaria floribunda may be recognized by its elliptic or lanceolate leaves with inconspicuous lateral veins, the long-acuminate leaf apex, the inflorescence of glomerules clustered in leaf axils, and the fruit, which falls together with the petals and hypanthium. This species is related to M . tenella , from which it is distinguished by leaves 4.4–7.3 × 2.8–3 cm (vs. 1–2.5 × 0.5–1.2 cm ), the long-acuminate leaf apex (vs. acute leaf apex), and the 2–4 mm long petiole (vs. 1–2 mm ). Distribution and habitat:— Widely distributed from Mexico to tropical America (POWO 2020). In Amazonian Maranhão, M . floribunda was found growing in secondary forests and along roads. Phenology:— Flowering in May. Specimens examined:— BRAZIL . Maranhão : Nova Esperança , Rio Alto Turiaçú , 17 May 1979 (fl.) I.J. Jangoux & R.P . Bahia 689 ( MG !). Santa Inês , Colônia Três Satubas , margem da estrada de terra, a 12 km da BR-316, cruzamento à direita a 20 km de Araguaná , 3°04’48” S , 45°45’ W , 13 May 1979 (st.), J. Jangoux 587 & R.P . Bahia ( NY !) . Santa Luzia , Faz Agripec-Varig , caminho para o Rio Mutum , margem esquerda do Rio Pindaré , 3°7’48” S , 45°39’29” W , 05 April 1983 (fl.), M.F.F. Silva 1008 (INPA, image); Km 20 da estrada Santa Luzia / Santa Inez , 3°57’48” S , 45°39’29” W , 29 July 1977 (fl.), D. Thomaz 406 ( PEUFR !) . São Luís , Reserva Florestal do Sacavém , 2°30’ S , 44°15’ W , 07 May 1992 (fl.), F.H. Muniz 95 (INPA, image); Rio Anil , 2°31’14” S , 44°17’47” W , 14 May 1949 (fl.), R.L. Fróes 24281 ( IAN !) ; Granja Federal , 2°31’47” S , 44°18’10” W , 12 May 1949 (fl.), R.L. Fróes 24243 ( IAN !) . Additional specimens examined:— BRAZIL . Amazonas : Manaus : Manaus - Porto Velho Highway, Km. 25, 4°46’06” S , 61°19’26” W , 19 March 1974 (fr.), G.T. Prance 20735 ( NY !) . Pará. Serra dos Carajás , 475-525 m , 5°48’ S , 50°33’ W , 07 June 1982 (fr.), C.R. Sperling 5952 ( NY !) .