Monographs Details: Macrocentrum maguirei Wurdack
Authority: Maguire, Bassett & Wurdack, John J. 1958. The botany of the Guayana Highland--Part III. Mem. New York Bot. Gard. 10: 1-156.
Family:Melastomataceae
Description:Latin Diagnosis - M. anychioidi Gleason affinis sed foliis longioribus oblanceolatis, petalis antherisque minoribus, staminum appendice dorsali longiore. Herba exigua ad 15 cm alta superne ramosa caulibus cum internodiis glabris subquadrangulatis nodis setosis setis robustis ca. 1 mm longis. Folia isomorphica; petiolus 1-3 mm longus; lamina 7-15 X 1.5-4 mm, oblanceolata apice anguste rotundata basi attenuata uninervia sparse (praecipue apicem versus) ciliata ciliis ad 1.5 mm longis et 1-3 mm inter se distantibus, supra et subtus primum sparse rubro-glandulosa supra demum glabrata. Flores solitarii 4-meri; pedicellus sub bracteolis ca. 5 mm longus, supra 0.5-0.7 mm; bracteolae 0.9 X 0.2 mm. Hypanthium 1-1.3 X 1-7-2 mm, sparse rubro-glandulosum breviter 8-alatum alis apice unisetosis seto ca. 1 mm longo. Calyx 0.3 mm coalitus, lobis 1.8 X 1 mm late semicircularibus paulo emarginatis. Petala 5.5 X 3 mm, oblongo-obovata apice subtruncata glabra. Stamina isomorphica; filamenta 2.8 mm; antherae thecae oblong-ae 1.1 X 0.3 mm, poro 0.1 mm diam., connectivo sub loculis (ad filamenti insertionem) inconspicue (0.1 mm) producto, appendice dorsali 0.6 mm longa hebetiacuta. Stylus 2.9 X 0.3-0.5 mm; stigma 0.4 mm latum, vix capitulatum; ovarium 3-loculare, apise truncatum; semina 0.5 X 0.3 mm, late pyramidata minute muriculata.

Discussion:

Type: flowers pink, infrequent in moist shaded places at base of waterfalls at head of Cafio Yutaje, elev. 1900 m, Cerro Yutaje, Terr. Amazonas, Venezuela, Feb 17-19, 1953, Bassett Maguire & Celia K. Maguire 35298 (NY).

M. any chio ides has a leaf-blade length-width ratio of 2-2.3 (rather than 3-4.5), much larger petals, larger linear anthers, and dorsal connective appendage only 0.2-0.3 mm long.