Synopsis of the Tribe Bocageeae (Annonaceae), with Revisions of Cardiopetalum, Froesiodendron, Trigynaea, Bocagea, and Hornschuchia

The tribal name Bocageeae Endliches is reestablished and the tribe is circumscribed on the basis of solitary internodal ebracteate pedicels that are articulated at the bases, and pollen shed in polyads of eight or more grains. Septate anther locules, large pollen size, and seed appendages are prevalent in the tribe. Intectate pollen with free-standing columellae, rare in Annonaceae, occurs not only in the genus Trigynaea but also in some species of Bocagea and Hornschuchia. As defined here, the Bocageeae include seven neotropical genera: Cymbopetalum, Porcelia, Bocagea, Cardiopetalum, Froesiodendron, Hornschuchia, and Trigynaea. The latter five genera are revised and the treatments include ten new species: Cardiopetalum plicatum, Froesiodendron urceocalyx, Hornschuchia lianarum, H. santossii, H. leptandra, Trigynaea cinnamomea, T. lanceipetala, T. triplinervis, T. lagaropoda, and T. axilliflora, all from tropical south America. A new combination, Froesiodendron longicuspe, changes the rank of that taxon from subspecies to species. Cardiopetalum surinamense is removed from Froesiodendron and reassigned to Cardiopetalum on the basis of its connate petals, dehiscent monocarps, and seeds with bilobed arils. A cladogram provides an explicit hypothesis of intergeneric relationships in the tribe. The new combination Onychopetalum periquino, based on Trigynaea periquino, is made.