Flora aquática do Recôncavo Baiano: Cordiaceae e Heliotropiaceae (Boraginales)

Abstract

Aquatic plants are those that photosynthetically active parts are permanently or periodically underwater or floating. Boraginaceae is a cosmopolitan family and widely distributed in several environments. The species reveal different habits since trees to herbs. In Bahia State there are 66 occurring species, distributed in six genera. The Recôncavo Region of Bahia is made by twenty counties with many basins and rivers that need a special attention, due to few studies available for the family, very important to maintenance of biodiversity. Furthermore, these environments have 9,5% of existing species. The Northeast region is also rich in species of this family, however there are few taxonomic studies specially to those one that habit in aquatic and mash environments. The analyzed material was collected between June 2008 and June 2019 with a total of about 11 expeditions, whose the exsiccates were deposited on Herbario of Recôncavo da Bahia (HURB) collection. Seven species were found belonging to nine genera. Varronia P. Browne, with two species (V. curassavica Jacq e V. multispicata (Cham.) Borhidi) e Heliotropium L., with two species (H. angiospermum Murray e H. indicum L.), were the most representative genera. The others genera showed one specie: Cordia superba Cham., Euploca procumbens (Mill.), Myriopus rubicundus (Salzm. ex DC.) Luebert. Descriptions, comments, geographic distribution maps and key to plant identification are presented.