Eumachia depauperata (Müll. Arg.) M.R. Barbosa & M.S. Pereira 2017

Taylor, Charlotte M., Razafimandimbison, Sylvain G., Barrabé, Laure, Jardim, Jomar G. & Barbosa, Maria Regina V., 2017, Eumachia expanded, a pantropical genus distinct from Psychotria (Rubiaceae, Palicoureeae), Candollea 72 (2), pp. 289-318 : 302-304

30. Eumachia depauperata (Müll. Arg.) M.R. Barbosa & M.S. Pereira , comb. nov. ( Fig. 1E, 1F ).

Ξ Mapouria depauperata Müll. Arg., Fl. Bras. 6(5): 466. 1881 . Ξ Uragoga depauperata (Müll. Arg.) Kuntze, Revis. Gen. Pl. 2: 960. 1891 .

Lectotypus (designated here): B RAZIL. Rio de Janeiro: Cabo Frio, 18.VII.1877, Glaziou 10944 (P [P00507168] image seen; isolecto-: G [G00300188]!, K [K000174389] image seen, R-9986 image seen).

= Psychotria carrascoana Delprete & E.B. Souza in Novon 14: 159, fig. 1. 2004 . Ξ Margaritopsis carrascoana (Delprete & E.B. Souza) C.M. Taylor & E.B. Souza in Syst. Geogr. Pl. 75: 171. 2005. Typus: BRAZIL. Ceará: mun. Ubajara, Planalto de Ibiapaba , Jabaruna Sul , 830 m, 5.I.1995, F.S. Araújo 1054 (holo-: EAC; iso-: NY), syn. nov.

Notes. – This species is found in dry vegetation, including caatinga, carrasco, restinga, and semideciduous forest, in Ceará, Paraíba, and Rio de Janeiro in eastern Brazil.

Mapouria depauperata was described in an addendum to Müller’s main flora treatment for Brazil, and this name has been overlooked. Also the species Margaritopsis carrascoana has been poorly documented until recently. The type of Mapouria depauperata is not separable from Margaritopsis carrascoana , and these names are synonymized here. The protologue of Mapouria depauperata noted that this species resembles Rudgea Salisb. and Coussarea Aubl. , thus similarly to other authors studying these species Müller apparently had difficulty classifying it to genus. ( Mapouria depauperata has not been transferred to Psychotria , but has been confused with the name P. depauperata Merr. in some on-line indices.)

In the protologue of Mapouria depauperata, MÜLLER (1881: 466-467) cited the collector and number of the type specimen without a place of deposit, following his standard practice, and gave the collection locality as “ Minas Gerais ”. The labels of Glaziou 10944 give the collection locality variously as Rio de Janeiro, where Cabo Frio is located, or Minas Gerais (P [P00507168]). The specimen of Glaziou 10944 in Müller’s herbarium at G comprises two short stems with leaves that are separated and perhaps taken from another specimen, and some annnotations by him. This G specimen has two handwritten labels, but no original printed Glaziou label. One label has a determination in Müller’s handwriting, which identifies this specimen with the unpublished name “ Rudgea depauperata ”. The other label is also in Müller’s handwriting, and has the collector, number, “ Rio de Janeiro ”, and an identification.This identification was initially written as “ Rudgea depauperata ”, then “ Rudgea ” was crossed out and replaced by “ Mapouria ”. A duplicate of the type collection is deposited at P, where Glaziou’s main specimen set is, and is labelled with the locality Minas Gerais and the name Mapouria depauperata in what is apparently Glaziou’s handwriting. The G specimen lacks flowers and fruits, which are described in the protologue, which suggests this is not the principal material that Müller used. Müller did see specimens from P, and the sheet from Glaziou’s main collection is here designated as the lectotype even though the collection locality on its label is inaccurate and this might be the holotype. Another duplicate of this type collection in good condition was once deposited in B, but has been destroyed (photo F neg. #451); this B specimen also could have been the holotype.

Figures

Fig. 1. – Photographs of Eumachia DC. A, B. Eumachia lyciiflora (Baill.) Barrabé, C.M. Taylor & Razafim.; C. Eumachia microdon (DC.) Delprete & J.H. Kirkbr.; D. Eumachia boliviana (Standl.) Delprete & J.H. Kirkbr.; E, F. Eumachia depauperata (Müll. Arg.) M.R. Barbosa & M.S. Pereira; G. Eumachia oleoides (Baill.) Barrabé, C.M. Taylor & Razafim. [A: Barrabé & Barriole 747; B: Barrabé 589; C: Coronado 6251; D: Araujo 1247; E-G: Unvouchered photos] [Photos: A, B: L. Barrabé; C: O.M. Montiel; D: C. Davidson; E, F: J. Jardim; G: H. Vandrot]