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Pseudobombax septenatum is a deciduous tree in the family Malvaceae and the subfamily Bombacoidae that grows to about 25 m. Green, vertical lines run up the stem of the tree. The mean DBH is 140 cm and has a bulging base (Croat, 1978). This bulging stem is 70 times more efficient at transferring water to the leaves that the leaf bearing stems. This allows it to have high transpiration rates and decreases the risk of embolism in the leaves and reproductive parts (Machado & Tyree, 1994). It is common in secondary forests from Nicaragua to Brazil (Croat, 1978; Condit et al., 2011). It has white flowers that are pollinated by bats and are eaten by monkeys and sloths (Croat, 1978; Happel, 1983; Ballesteros et al., 2009). It produces woody, dehiscent fruit that is filled with grayish kapok or cottony filaments and winged seeds that are dispersed by wind (Croat, 1983).