Currently, pollination is seen as involving more generalist interactions than specialized
ones. Supporting this trend, some nocturnal distylous flowers may also receive floral visitors
during the day, and since the latter contribute to fruit set, the pollination system is mixed and
less specialized. Common among the Rubiaceae, distyly has been regarded as a
reproductive strategy which requires a precise and specialized pollination system, and in
this important tropical family, environmental disturbance and pollination failure have been …