Plant phenology in a cloud forest on the island of Maui, Hawaii

We recorded the times of flowering, fruiting, and leafing for ten native canopy and subcanopy trees and shrubs (monthly from December 1994 through December 1997) in a montane cloud forest with relatively aseasonal rainfall on the island of Maul, Hawaii. These species represented the great majority of individual woody plants at the sits. Flowers and fruits were available in the community year-round: however, all species exhibited annual patterns of flowering, and four species showed annual patterns of fruiting while the rest fruited in supra-annual patterns. Many species had protracted flowering or fruiting perks, and some bore small numbers of Rowers or fruit year-round. Most species Glowered in a monthly peak mainly between May and August, corresponding to the period of greatest solar irradiance and marginally higher temperatures. Fruit ripening followed at varying intervals. In contrast, the heaviest flowering occurred between November and March, resulting from bloom of the dominant tree, Metrosideros polymorpha. At the highest elevations, Metrosideros flowering was heaviest during September, but peak flowering of lower elevation trees occurred in late fall and winter. Two forms of this species differed in their temporal and spatial patterns of flowering. For M. polymorpha var. polymorpha and var. incana bloom peaked annually between November and January; however, For M. polymorpha var. glaberrima, flowering peaked from April through July, with an earlier secondary peak in January.