Myrcia fasciculata (O. Berg) K. Campbell & K. Samra

Amorim, Gabriela Dos Santos, Barbosa, Maria Regina De Vasconcellos, Jr, Eduardo Bezerra De Almeida & Thomas, William Wayt, 2022, Taxonomic study of Myrtaceae in forest fragments in Amazonian Maranhão, Brazil, Phytotaxa 568 (1), pp. 27-60 : 47

22. Myrcia fasciculata (O. Berg) K. Campbell & K. Samra (in Campbell et al. 2019: 148).

Basionym:— Calyptranthes fasciculata O. Berg (1855: 31) .

Type:— GUYANA. “ Guiana Angelica, ad fines Guianae Batavae ”, R.H. Schomburgk 979 (lectotype designated by McVaugh [1989, p. 475]: G) .

Shrubs ca. 6 m. Twigs pubescent, the indumentum brownish-red. Leaves with petioles 4–5 mm long, sparsely pubescent, channeled or shallowly channeled; blades elliptic to broadly so, or ovate, 4.7–8.7 × 2–4 cm, glabrous adaxially and pubescent abaxially, the in indumentum dument brownish-red, membranaceous, discolorous; glands not seen; apex long acuminate or cuneate; base rounded; midvein adaxially slightly sulcate; lateral veins slightly visible, not arched, 16 to 20 pairs; intra-marginal vein 1 mm or less from the margin, margin flat. Inflorescence axillary or subterminal, panicle, umbelliform, flowers congested, the axis 0.5–0.7 cm long, sometimes inconspicuous, pubescent, the indumentum brownish-red; bracts not seen, caducous before anthesis; pedicels 8 mm long, pubescent, the indumentum brownishred; bracteoles not seen, caducous before anthesis; flower buds globose, 4 × 5 mm, not constricted above ovary; calyxlobes completely fused, opening by calyptra, caducous in the fruit; ovary not seen. Immature fruits globose, 0.7 × 0.8 cm, pubescent, surface smooth.

Note:— Myrcia fasciculata may be recognized by its leaves, which are elliptic to broadly elliptic, or ovate, with slightly visible lateral veins; an umbeliform panicle; and globose fruits which are pubescent and have a smooth surface.

Distribution and habitat:— Known from Guyana and northeastern and northwestern Brazil (Amazonas, Pará, Maranhão, Mato Grosso, Rondônia and Roraima states) (Rosário et al. 2014). In Amazonian Maranhão, M. fasciculata was found growing in flooded forests.

Phenology:— Fruiting in December.

Specimens examined:— BRAZIL. Maranhão: Pinheiro, Rio Alto Turiaçu, Nova Esperança , 2°55’12” S, 45°45’ W, 04 December 1978 (fr.), J. Jangoux 213 ( NY!) .

Additional specimens examined:— BRAZIL. Amazonas , Santa Isabel do Rio Negro , Margem direita do Rio Negro, serra do Jacamin, 150 m, 0°18’ S, 65°28’48” W, 11 October 1987 (fl.), C.A. C. Ferreira, P. Maas, M.V. Roosmalen, R.P. Lima & J. G. Oliveira 9347 (US, image) . Rondonia , Espigão do Oeste, BR-364, rodovia Cuiabá-Porto Velho, estrada da FUNAI, km 05, 11°20’53” S, 60°45’21” W, 20 June 1984 (fr.), C.A.C. Ferreira 4678 ( NY!) ; Estrada Boa Vista-Venezuela , Rio Surumu, 01 December 1977 (fr.), W.C. Steward 161 ( NY!) . Roraima , Ilha de Maracá: Sema Ecological Reserve, 3°21’ N, 61°31’00” W, 28 April 1987 (fr.), W. Milliken M.129 ( NY!) .