Abstract
This manuscript presents a survey of the species of Olyreae in the Santa Catarina Island, located at the Atlantic Rainforest biome, at the coast of the Santa Catarina state, southern Brazil. The tribe Olyreae comprehends herbaceous bamboos, which are distributed along tropical and subtropical forests, especially in the Neotropics. This tribe is characterized by the presence of unisexual spikelets, usually dimorphic, and 1-flowered with no rachilla extension and epidermal silica cells usually with cross-shaped silica bodies in the coastal zone and crenate in the intercostal zone. Botanical collections were carried out between May 2011 and March 2013. In addition, morphologic analysis of the vegetative and reproductive structures and microphotographs of the female anthecia of herbarium collections were conducted. Three genera and five species were recognized in the study area, all pertaining to the subtribe Olyrinae: Olyra glaberrima, O. humilis, O. latifolia, Parodiolyra micrantha and Reitzia smithii. Most species is only present in small populations in preserved areas or in areas of natural regeneration. Parodiolyra micrantha is the most common and widely distributed species on the Island, while Reitzia smithii is the species with more restricted distribution, collected again after 34 years in the state of Santa Catarina. Descriptions, illustrations, identification key and comments for each species are provided.
Key words:
herbaceous bamboos; Atlantic Forest; Olyra; Parodiolyra; Reitzia smithii
