Fig. 2.

Alcohol concentrations of nectar of the bertam palm. The three nectar stages differ significantly (P < 0.001). Nectar inside the buds (n = 21) has significantly higher alcohol concentrations than nectar that has been clinging outside to the buds for >30 min (“older” nectar, n = 21; P < 0.001). Nectar that accumulated ≤30 min at the buds' outer surface (“fresh” nectar, n = 35) has significantly higher alcohol concentrations than older exuded nectar (P < 0.001). Nectar inside the buds tends to have a higher alcohol content than freshly exuded nectar (P = 0.203). Boxes and whiskers show means, SE, and SD respectively. Significant pairwise differences between the different nectar types are indicated by asterisks.