The commerce of guarana seeds (Paullinia cupana H.B.K. var. sorbilis (Mart.) Ducke) is economically important in some regions of Brazil. However, few studies are found about its phenological characteristics. The aim of this paper was to study the production and distribution of organic matter in adult plants of guarana. Five individuals, which had more than 100 branches per plant/year, were evaluated. One found out that only 50% of the branches had fruits. The guarana plants had between 445 and 1294 inflorescences but of these, 67% to 98% had only one fruit. The total organic matter was evaluated in 15.8 kg per plant year-1 which means around 6350 kg ha year-1. The organic matter storage in guarana plant had the following sequence: leaves>branches>seeds>rachis> fruit peel+aril> petiole.
Branches; total dry matter; seeds; leaves; inflorescences; fruits; guarana; Paullinia cupana
