A new occurrence of Bulbophyllum (Orchidaceae, Epidendroideae) for the state of Goiás, Brazil

Abstract

Studies on the Orchidaceae family in the Chapada dos Veadeiros National Park revealed a new occurrence for the family to the flora of the Goiás state. Bulbophyllum adiamantinum, hitherto considered endemic to the state of Minas Gerais, is described here, illustrated, commented on its distribution, morphological relationships and period of flowering and fruiting. In addition, a map with distribution this species, its preliminary conservation status, images and notes on the anatomy of its vegetative system and its more morphologically, B. insectiferum, with which it can be confused, are provided. Anatomically, both species differ mainly by the presence or absence of silica bodies in the vegetative system and tracheoid idioblasts in the mesophyll, by the arrangement of the fibers and the appearance of the lumen of the cells of the exoderm, endoderm, pericycle and medulla in the roots. The characters that showed themselves to be variables were the number of vascular bundles, the shape of the cells of the epidermis and the thickness of the cuticle of the species studied.

Key words:
anatomy; Chapada dos veadeiros; flora; taxonomy