Miconia leptopus (Triana) Michelangeli & R.Goldenberg

Valente, Beatriz Do Nascimento, Baumgratz, José Fernando A. & Maia, Vitor Hugo, 2020, Nomenclatural novelties in Miconieae (Melastomataceae): new synonym and typifications, Phytotaxa 443 (2), pp. 179-188 : 184-186

3. Miconia leptopus (Triana) Michelangeli & R.Goldenberg in Michelangeli et al. (2019: 102)

≡ Clidemia capillaris Don (1823: 308)

≡ Ossaea leptopus Triana (1871: 147)

≡ Ossaea capillaris (Don) Cogniaux in Martius, Eichler & Urban (1888: 550–551), nom. illeg. non O. capillaris (Swartz) Wright.

Type:— PERU. Hab. in Peruvia. Pavón s.n. Herb. Lamb. Not found. (neotype PERU. Huánuco: Casapi, s.d. (fl, fr), Mathews 1723 BM! designated here) . — Fig. 4 .

Don (1823: 308) described C. capillaris based on the specimen Pavón s.n. (Herb. Lamb.), collected in Peru, and noted that the specific name was proposed by the collector himself in a manuscript. Triana (1871: 147) transferred C. capillaris to Ossaea , but gave it a new name, O. leptopus , and listed in the synonymy “ C1idemia 1eptopus Mart. mss., C. capillaris Don, Me 1astoma capillaris Pav. mss. non Swartz”. Cogniaux (1888: 551) also transferred C. capillaris to Ossaea [ O. capillaris (Don) Cogn. ], and listed in the synonymy “ Clidemia capillaris Don , Melastoma capillaris Pav. msc. ex Don (non Sw.), Ossaea leptopus Triana , Clidemia leptopus Mart. msc. ex Triana ”. However, he created a later homonym since Wright (1868: 435) had already proposed the name O. capillaris , based on Melastoma capillaris Swartz.

The epithet M. capillaris Pav. was cited by Candolle (1828: 157) in schedulae, while Triana (1871: 147) cited this same name and “ C. leptopus Mart. mss.” as synonyms (pro syn.), but neither name was validly published.

Ruiz & Pavón’s collections were deposited at A. B. Lambert’s herbarium, in London ( Miller 1970). This herbarium was auctioned after its owner’s death, and Ruiz & Pavón’s collection was divided in lots to be sold; it is difficult to settle the precise location where the collections are housed nowadays, but they were mainly transfered to B, BM, CGE, F, G, GH, LE, MO, NY, OXF, US ( Miller 1970). We consulted these herbaria but no specimen of C. capillaris collected by Pavón was located.

Triana (1871) analyzed four collections: Haenke s.n., Mathews 1723, Pavón s.n. and Poeppig 1094. Since the original material used by Don (1823) to describe C. capillaris was not found, we here indicate Mathews 1723 (BM) as the neotype of this basionym according to ICN ( Turland et al. 2018:Art. 9.8), since it is well preserved, morphologically circumscribes the species, and has immature fruits.

Souza (1998) revised the genus Ossaea and indicated the specimen Mathews 1723 (BM) as the lectotype of O. leptopus ( Souza 1998) . However, this specimen is not part of the protologue of C. capillaris , and it cannot be designated as the lectotype according to Art. 9.3 of the ICN ( Turland et al. 2018).

Miconia leptopus occurs in Peru, Ecuador, Bolivia, and Brazil, where it is found only in the states of Acre and Amazonas. It differs from Miconia capillaris mainly by the branches and adaxial surface of the leaves sparsely to densely sericeous (vs. glabrous); leaf blade with rounded to obtuse base (vs. acute to obtuse) and ciliate margin (vs. non-ciliate); marsupiform domatia (vs. domatia absent); 3(5)+2 acrodromous nerves, the inner suprabasal, usually alternate, and the outer pair basal or ca. 1 mm suprabasal (vs. 3 acrodromous basal nerves); and flowers pentamerous (vs. tetramerous).

Figures

FIGURE 4. Neotype of Clidemia capillaris D.Don (Matheus 1723 BM), collected in Peru.