Brachyotum multituberculatum Wurdack

  • Authority

    Wurdack, John J. 1953. A revision of the genus Brachyotum (Tibouchineae-Melastomataceae). Mem. New York Bot. Gard. 8 (4): 343-407.

  • Family

    Melastomataceae

  • Scientific Name

    Brachyotum multituberculatum Wurdack

  • Description

    Species Description - Trichomata laevia. Ramuli novelli obscure quadrangulati cum petiolis pedicellisque dense gracili-hirsuti pilis adscendenti-patentibus ad 1-2 mm. longis. Petiolus 1-2 mm. Lamina 4.5-6 x 3-4.5 mm. ovata vel elliptico-ovata apice basique obtusa, nervis primariis 3 sed ab pilis occultis; supra tuberculis crassis tumidis 2/mm.2 (35-40 per lamina) in series 6 regulariter dispositis dense onusta, tuberculo abrupte setifero seto ca. 0.5 mm. longo; subtus dense gracili-hirsuta, pilis 15/mm.2 et ad 2 mm. longis. Flores 5-meri conferto-terni bracteis duabus investi, dichasio ab foliis subtento. Pedicellus sub bracteis 3-5 mm., super 2-3 mm.; bracteae 8 x 9 mm. late ovatae apice obtusae, supra parte tertia vel quarta apicali tuberculis dense onustae sed alioqui glabrae, subtus sparse laxo-strigosae, minime usque ad anthesim persistentes. Hypanthium 4X 5.5 mm., medio 0.3 mm. crassum, modice gracili-strigosum 8-9/mm.2 Sepala 4.5 x 3-3.5 mm. oblonga apice late acuta vel anguste obtusa basi per 0.5 mm. cohaerentia, sinu acuto. Petala purpurea 11-12 x 9 mm. asymmetrice obovata apice rotunda, ciliis glandulosis 0.1-0.4 mm. (terminali ad 1 mm.). Filamenta 3.5-4 mm.; antherae 3—3.5 mm., poro 0.5~0.6 mm. diam.; connectivum basi antherae 1.5—2 mm., ab anthera per 1-1.5 mm. liberum, lobis ventralibus 1-1.5 mm. longis singulis 0.6-0.7 mm. latis. Stylus 20 x 0.6 mm., per 7 mm. exsertus. Ovarium 5x 3.5 mm. apice per 3 mm. dense gracili-strigulosum, lobis apicalibus super loculos 1.5 mm.

  • Discussion

    Type Collection and Locality: L. Williams 7587 (HOLOTYPE F; isotype NY); Peru, Dept. Amazonas, "La Jalca " between Chachapoyas and Moyobamba, alt. 2700-3300 m., 21 Jan. 1930. Known only from the type collection.

    The closest relative of this species seems to be B. markgrafii; it may be distinguished from that species by the leaf tubercles in 6 rows at the widest part of the leaf, the generally finer stem, hypanthial, and lower leaf surface pubescence, the much larger pedicellar bracts, and much longer apical ovary lobes.