Myrcia sintenisiana M.F.Santos, 2020

Santos, Matheus F., Stadnik, Aline, Proença, Carolyn E. B. & Sobral, Marcos, 2020, The near demise of Marlierea: moving last species to correct genera and notes on three incertae saedis taxa (Myrtaceae, Myrteae, Myrciinae), Phytotaxa 447 (3), pp. 195-202 : 197

4. Myrcia sintenisiana M.F.Santos , nom. nov. Replaced name: Marlierea sintenisii Kiaerskou (1889: 252) .

Type:— PUERTO RICO. “ Sierra de Luquillo, in monte Jimenes ”, 1885 (fl), Sintenis 1476 (lectotype, designated here: K!; isolectotypes: LD [image!], US [not seen]) .

The closed floral bud suggests affinity with Myrcia sect. Aulomyrcia ( Lucas et al. 2016, 2018), but the species does not present other clear morphological affinities with the section. The species has a narrow distribution, being found only in the Luquillo Mountains in Costa Rica (Kiaerskou 1889, WCSP 2020).

A new name is required as Myrcia sintenisii Kiaerskou (1890: 257) already exists. The new name keeps the intention of the basionym, a tribute to the collector of the type specimen. The specimen at herbarium K was selected as the lectotype because it bears Kiaerskou’s handwriting on the label and matches the protologue.

5. Myrcia resupinata (Vellozo [1825]1829: 214) M.F.Santos, comb. nov. Basionym: Myrtus resupinata Vell. Marlierea resupinata (Vell.) O. Berg (1855: 18) .

Type:— BRAZIL. [specimen lost] (lectotype, designated here: original parchment plate of Florae Fluminensis deposited at the Manuscript Section of the Biblioteca Nacional of Rio de Janeiro, latter published in Vellozo ([1827] 1831, v. 5, tabula 61).

The generic placement of Vellozo’s species in Myrtaceae is not always straightforward but in this case the panicle and the calyx with five lobes indicate that the species does indeed belong to Myrcia . The inflorescence with short lateral axes and irregular tearing of the calyx at anthesis (although sometimes also portrayed as regular) can be associated with Myrcia sect. Aulomyrcia ( Lucas et al. 2018) . In the protologue, Vellozo (1829) described stipules at the base of the branch; however, they are cataphylls, a recurrent feature of Myrcia species. These cataphylls and the large leaves with a cordate base are distinctive characters of the species, and suggest some morphological affinity with Myrcia eumecephylla (O. Berg 1857: 98) Niedenzu (1893: 76) . We did not find any herbarium specimens that could be assigned to the illustration of Myrtus resupinata but believe it is a distinct species.