Morphological descriptions are provided for inflorescences of pistillate and staminate flowers of a population of Astrocaryum aculeatum Meyer located on the campus of the Instituto Nacional de Pesquisas da Amazônia (INPA). The inflorescence is an interfoliar, panicle of spikelets, with a peduncle, and medium size of 146 ± 20.3 cm in length. Woody, thorny bracts are present on the entire external surface, protecting the inflorescence. Each inflorescence had approximately 375 ± 49.5 rachillae. Each inflorescence was estimated to have about 500 to 1.200 pistillate flowers and 190.000 to 260.000 staminate flowers. Staminate flowers varied in colouration from wine to cream and intermediate mixes of wine and cream.
Floral Morphology; Astrocaryum aculeatum; Palm; Amazonas
