The explosive floral-mechanism and pollination in the genus Hyptis (Lamiaceae).
Hyptis is a New World genus with a few of its species occurring in the Old World. It is characterised by having the sexual floral organs enclosed in the carinal-like lower lip which 'slips' explosively or non-explosively when the appropriate forager seeking a floral reward lands to feed. The principal pollinating agents include bees [Apidae], wasps [Vespidae] and hummingbirds. Very few species have been studied compared to the vast number of species listed in the genus. Hyptis have flag-shaped blossoms and are adapted to an asternotribic mode of pollination. Information on the floral mechanisms and pollination in the genus is reviewed and compared with similar floral mechanisms found in other members of Lamiaceae, and members of other families of angiosperms.