Phenology of an agarophyte Gracilaria birdiae Plastino and E.C. Oliveira (Gracilariales, Rhodophyta) in Northeastern Brazil - Carneiro, Marcella A. A; Marinho-Soriano, Eliane; Plastino, Estela Maria (Revista Brasileira de Farmacognosia = Brazilian Journal of Pharmacognosy, 2011)