Monographs Details: Macrocentrum chimantense Wurdack
Authority: Maguire, Bassett. 1989. The Botany of the Guayana Highland- Part XIII. Mem. New York Bot. Gard. XIII: 1-127.
Family:Melastomataceae
Description:Species Description - Suflfrutex 12-20 cm, ramulis sicut foliis sparse glandulis ca. 0.05 m m longis indutis. Folia in quoque pari essentialiter isomorphica; petioli 1- 2 m m longi; lamina 0.8-1.4 x 0.3-0.5 c m ellitica vel paulo obovato-elliptica apice hebeti-acuto basi anguste acuta, chartacea apicem versus obscure bidenticulata alioqui integra eciliata, glandulis exceptis glabra, 3-pseudoplinervata nervis secundariis nervulisque non evolutis. Flores 5-meri in ramulis foliosis terminales solitarii; pedicelli ca. 6 m m longi sicut hypanthia modice puberuli pilis 0.1-0.2 m m longis caduce inconspicueque glanduliferis. Hypanthium (ad torum) 2 m m longum; calycis tubus 0.2-0.5 m m longus, lobis interioribus 1.2-1.5 m m ovatis rotundatis, dentibus exterioribus subulatis 1.3-1.5 m m eminentibus. Petala glabra 8.1-9 x 3.2-4 m m obovato-oblonga apice rotundata et 0.03 m m mucronulata. Stamina isomorphica glabra; filamenta 4 m m longa; thecae 3.1-3.3 x 0.25 m m

Discussion:

Type. Venezuela. Bolivar: Amuri-tepui (W sector of Acopan-tepui), Chimanta Massif, 1850 m alt., petals pink, anthers yellow, filaments creamy, leaves dark green above, yellow green below, moist rocks along streamlet at base of small canyon, 2-5 Feb 1983, /. A. Steyermark, O. Huber & V. Carreno 128467 (holotype U S 1959741, isotype V E N ) . Paratype (topotypical). Steyermark, Huber & Carreno 128601 (US, V E N ).

Macrocentrum angustifolio Gleason afl&nis, foliorum laminis latioribus antheramm dente dorsali breviore hebeti diflfert.