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Join Honouliuli National Historic Site (National Park Service) and Emily Grave (Terraformation) for this educational discussion on Hawaii's native dry land forest tree, the wiliwili, which is located within Honouliuli National Historic Site's park grounds.

In this talk, Grave will explore the ethnobotany and cultural uses of the endemic wiliwili (Erythrina sandwicensis), as well as its pollination biology and a bit of demographics. Wiliwili, a native Hawaiian tree, holds great significance for several reasons. Historically, Hawaiians have used its lightweight wood for making tools, surfboards, and canoes, while also utilizing the tree for medicinal purposes. From a pollination biology perspective, the tree’s vibrant, tubular flowers were originally adapted to attract native pollinators, particularly Hawaiian honeycreepers and certain bees, which played a crucial role in its reproduction. However, as these native pollinators have retreated to higher elevations, new pollination relationships have developed in the tree's lower, dry forest habitats. This evolving interaction between wiliwili and its pollinators underscores the critical need to preserve native ecosystems in order to protect both plant and animal populations in Hawaiʻi.