ABSTRACT
A taxonomic study was made of Burmanniaceae and Gentianaceae from the Usina São José. Collecting was done in six forest fragments, from 2007 to 2009; vouchers from local herbaria were also studied. Three species of Burmanniaceae (Apteria aphylla , Gymnosiphon divaricatus , and G. sphaerocarpus ) and four of Gentianaceae (Coutoubea spicata , Voyria caerulea , V. obconica , and V. tenella ) were found. Only C. spicata is autotrophic, the others are myco-heterotrophic. Specimens were found only in the largest fragments and the myco-heterotrophs can be considered potential bioindicators of preserved environments. Gymnosiphon sphaerocarpus is recorded for the first time in Brazil.
Key-words:
Atlantic rain forest; myco-heterotrophs; Northeastern Brazil; saprophytes