A. acuminatus is a common member of the humid subtropical lowland rainforest in Taiwan. As an epiphyte, it doesn't get too much attention. But when it comes to the fruiting season (from March to August), sometimes its abundant dehiscent fruits and tiny seeds flying in the sky are hard to be neglected. From observation, the natural fruit sets rate is high, and the small seedlings are easy to be found throughout wet forest floors. The reproductive success in this species is seemly high.

As it crosses the broader of sunbird distribution, how does it retain or even enhance such reproductive success comes as a conundrum. This conundrum led to several hypotheses: Is the species change its pollination partner and if that is the case, is the pollinator shift correlated with the strange floral morphology? Or, the species adopted different reproductive strategies, such as autonomous selfing, which is common in island flora? And if the pollinator shift did occur, is the pollination effectiveness drop as it utilized a more generalized pollination syndrome with more interspecific interference similar to common phenomena in flora lack of specialized pollinators. 

Flowers of A. acuminatus are protandrous, which means the male organs mature first and then female parts came next. From the direct observation and pollination experiments (Unpublished data), there's no evidence that autonomous selfing occurs in the reproductive strategy of A. acuminatus. The time-lapse video on the right demonstrates the progress of flowering of A. acuminatus, both characters mentioned above could be observed in this clip. Thus, the hypothesis of obligate selfing can be ruled out, and high reproductive success comes from pollination success by the contribution of pollinators.