How many flowers are in the rainforest?

If you take flowers to mean angiOSperms (the group name for all flowering plants) then surprisingly few are found in the rainforest. This is primarily due to the lack of sunlight that is capable of penetrating through the thick upper canopy (only around 2% reaches the forest floor).

Most plants produce a 'flower' of some sort - an organ which disperses/collects gametes of the opposite sex. The majority of rainforest plants are insect pollinated as there is little wind flow. A surprisingly number are pollinated by mammals (eg bats) as well as the more common insect pollination.