Physokentia dennisii is a species of palm tree in the family Arecaceae. It is found only in Solomon Islands. It is threatened by habitat loss.
Physokentia dennisii is named after Geoffrey F.C. Dennis (1918-1995), an Australian born botanist and resident of the Solomon Islands since 1946. This palm is a handsome species with a solitary slender bright green, ringed trunk supported by numerous slender stilt roots to a height of about 2 metres above ground in mature specimens. It has a light green crownshaft bearing long arching leaves with numerous pointed leaflets. The inflorescence is ivory-colored, and globular fruits ripen black. It can grow to over 10 metres and it is an understorey palm, even at maturity.