Eugenia guanabarina (Mattos & D.Legrand) Giaretta & M.C.Souza, 2018

Giaretta, Augusto, Lucas, Eve, Souza, Marcelo Da Costa, Mazine, Fiorella F. & Sano, Paulo, 2018, Nomenclatural notes on Eugenia with closed calyces: Calycorectes O. Berg and Mitranthes O. Berg (Myrtaceae), Phytotaxa 362 (3), pp. 282-286 : 284-285

4. Eugenia guanabarina (Mattos & D.Legrand) Giaretta & M.C.Souza , comb. nov. Marlierea guanabarina Mattos &

D.Legrand (in Legrand & Mattos 1975: 6).

Type:— BRAZIL. Rio de Janeiro, Recreio dos Bandeirantes, Pedra de Itaúna , 22 [July] 1965, N. Santos 5967 (holotype MVM [‘18113 herbarium number’-photo!]; isotype R) .

Chytraculia bergiana Kuntze (1891: 238) [non Eugenia bergiana Grisebach (1860: 182) ]. Mitranthes langsdorffii O. Berg (1859: 595) . Neomitranthes langsdorffii (O.Berg) Mattos (1981: 2) , syn. nov. Type:— BRAZIL. Bahia, s.d., Blanchet 2309 (lectotype designated here LE!; isolectotypes F [‘69177 negative number’-photo!], G! [00222536-2 sheets, 00222537-2 sheets], K! [000018787], NY [00405346-photo!], P! [00162722, 05232287], W! [0118258-herbarium number]). Remaining syntypes: BRAZIL. Bahia, ‘in silvis ad flumen Itahype prope Castel novo’, s.d., Riedel s.n. (G! [00222538, 00222539-2 sheets], K! [000331517], LE! [6 sheets], M [0146829-photo!], MEL [666925-photo!], P! [05232220, 05232222], W! [0070788, 0100484-herbarium number]).

Calycorectes teixeireanus Mattos (1996: 1) . Eugenia teixeireana (Mattos) Mattos (2005: 9) , syn. nov. Type:— BRAZIL. Rio de Janeiro, Barra da Tijuca, 13 July 1964, W. Hoehne 5759 (holotype SP! [001302]; isotypes FLOR, MBM! [69215-herbarium number], NY [00886386-photo!], UB!, UEC).

Notes:—Taxonomy of this species has been historically confused due to the combination of the closed calyx in the bud tearing via a calyptra-like structure and thyrsoid inflorescence, features commonly associated with Myrcia s.l., and the embryo with fused cotyledons that suggests a relation to the ‘ Plinia group’ (sensu Lucas et al. 2007) and Eugenia . Its relationship to Eugenia was previously suggested ( Souza 2009) and is here transferred due to its highly supported emergence in Eugenia sect. Schizocalomyrtus according to the phylogenetic reconstruction of Giaretta et al. (in prep.). Chytraculia bergiana is a replacement name for Mitranthes langsdorffii therefore, the later available basionym. However, the new combination is unavailable in Eugenia due to pre-existence of Eugenia bergiana . Thus, Marlierea guanabarina is the later name available to be combined. Although the epithet has an improper Latin termination, the original spelling must be retained since it does not fit to any conditional rule of the ICBN (see Art. 60 in McNeill et al. 2012).

5. Eugenia neoriedeliana M.C.Souza & Giaretta , nom. nov. Mitranthes riedeliana O. Berg (1859: 595) . Chytraculia riedeliana (O.Berg) Kuntze (1891: 238) . Calyptrogenia riedeliana (O.Berg) Burret (1941: 546) . Neomitranthes riedeliana (O.Berg) Mattos (1990: 6) , syn. nov.

Type:— BRAZIL. Rio de Janeiro, ‘Habitat in silvis prope Madiocca’, s.d., Riedel & Langsdorff s.n. (lectotype designated here K! [000331528]; isolectotypes F [‘72823 negative number’-photo!], LE! [6 sheets], M [0146828-photo!], NY [00405349-photo!], P! [00723175, 00723176, 00723177], S [photo!], OXF! [00071623, 00071645]) .

Notes:—Although the floral morphology of Mitranthes riedeliana is in accordance with the current circumscription of Eugenia , the opening of the bud at anthesis via a calyptra-like structure mislead Berg (1859), as did the absence of available fruits at the time. However, straight stamens in the bud in Eugenia (vs. strongly curved in Myrcia s.l. and the ‘ Plinia group’; see Vasconcelos et al. 2015) suggests its correct placement in Eugenia sect. Schizocalomyrtus , confirmed by the molecular phylogeny of Giaretta et al. (in prep.). A replacement name is here assigned as Mitranthes riedeliana is unavailable in Eugenia due to the pre-existence of Eugenia riedeliana ( Berg 1857: 261) .