Medial sections of androecial hoods of Bertholletia excelsa.

Medial sections sections of an androecium of Bertholletia excelsa based on an unvouchered tree, Amazonas, Brasil. Left: section with the vestigial stamens in place to show their swept-in orientation and split into a posterior hood extension and an anterior hood extension. Note the clavate filaments of the outermost stamens (right) and the unidimensional filaments of the inner stamens. The distance from A to C is the ligule and from B to C is the androecial hood (including the vestigial stamens.