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.[1]
It inhabits open wet forests in the Kalihiwai Valley, where it grows at altitudes of 500-. Associated plants include ʻaiea (Ilex anomala), ʻahakea (Bobea spp.), hame, (Antidesma spp.), hāpuʻu pulu (Cibotium glacum), and kōpiko (Psychotria hexandra).[1]
It is a medium-sized palm from 6- tall, with palmate (fan-shaped) leaves about 1m (03feet) long. The fruit is produced in dense clusters, each fruit green, pear-shaped, 4cm (02inches) long and 2.5cm (01inches) in diameter.[1]
Like the related Nihoa Fan Palm (P. remota), it is susceptible to extinction by a single catastrophic event because of its wild population of four individuals. It is threatened by introduced rats, which eat the seeds. It has been cultivated to a moderate extent, but is exceptionally limited in its habitat.[1]