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Issue: Vol. 625 No. 1: 7 Nov. 2023
Type: Article
Published: 2023-11-07
DOI: 10.11646/phytotaxa.625.1.6
Page range: 88-97
Abstract views: 189
PDF downloaded: 17

Myrcianthes (Myrtaceae) revisited: a new species, a new synonym, a lectotypification and an overview of its wood anatomy

Depto. de Botânica; Universidade de Brasília; Brasília; Distrito Federal; Brazil; 70910-900; Royal Botanic Gardens; Kew (Associate Researcher); Richmond; United Kingdom; TW9 3AB
Serviço Florestal Brasileiro; SCEN Lote 04; Brasília; Distrito Federal; 70818-900
Depto. de Biologia; Universidade Federal de Sergipe; Av. Marcelo Déda Chagas s.n.; São Cristovão; Sergipe; Brazil; 49107-230
Depto. de Ecologia; Universidade Federal do Rio Grande do Norte; Lagoa Nova; Natal; Rio Grande do Norte; Brazil; 59078-970
Independent Researcher; Reserva Imburanas da Volta; Canindé; Ceará; Brazil; 62.700-000
Depto. de Botânica; Universidade de Brasília; Brasília; Distrito Federal; Brazil; 70910-900
Eudicots Atlantic Forest Eugeniinae Neotropical Flora Wood Anatomy

Abstract

Myrcianthes is a New World genus of Myrtaceae (Tribe Myrteae) with 38 currently accepted species that was monographed in 1992. This paper proposes a new species, Myrcianthes cruciata from Northeastern Brazil (Bahia, Ceará and Sergipe), the synonymization of M. cavalcantei under M. fragrans and the lectotypification of the former name. Myrcianthes cruciata is similar to M. pseudomato but differs in the longer peduncles, 3.5–5 cm (2–4 cm in M. pseudomato) and greater number of ovules per locule, c. 15–30 (15–20 in M. pseudomato), as well as the morphology of the embryo, which is reniform in M. cruciata and strongly invaginated in the middle (almost V-shaped) in M. pseudomato and also emerged in different lineage in the phylogeny. The wood anatomy of the new species is similar to other species of the genus: diffuse porous, with exclusively solitary vessels with high density, no vessel arrangement, with simple perforation plates, vessel-ray pits with distinct borders, similar to the intervessel pits in size and shape, apotracheal parenchyma, rays 1–3 cells wide, with disjunctive ray cells; no helical thickenings were observed in the vessels, nor any mineral inclusions in the axial or ray parenchyma.

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