Pritchardia viscosa, the stickybud pritchardia or loʻulu, is an extremely rare endangered species of Pritchardia palm that is endemic to the Hawaiian island of Kauaʻi. It inhabits open wet forests in the Kalihiwai Valley, where it grows at altitudes of 500–700 m (1,600–2,300 ft). Associated plants include ʻaiea (Ilex anomala), ʻahakea (Bobea spp.), hame, (Antidesma spp.), hāpuʻu pulu (Cibotium glacum), and kōpiko (Psychotria hexandra).