P. leptocladum C. DC.; P. diazanum Trel. Occasional in clearings, open areas in the forest, and exposed areas on the lakeshore, particularly abundant in the Laboratory Clearing. Lacking strong seasonal flowering behavior, it can be seen with flowers or fruits most of the year. A flush of flowering occurs with the beginning of the dry season; flowering then continues through most of the rainy season. Most fruits mature at the end of the rainy season and in the early dry season. This species was mistaken for P. pseudo-cativalense Trel. by Standley in his Flora of Barro Colorado Island. It may be confused with both P. hispidum and P. culebranum, but can be distinguished by having short and appressed trichomes on the lower leaf surface, a leaf scar, and a lunate prophyll. The other species are usually much taller and are restricted to the forest.