Elaeocarpus hookerianus. Pōkākā
Kiakia [sic] gathered from near Outram and soaked with the bark of pōkākā to dye it (Māori informant in Beattie 1920).
Produces good firm leather (Kirk 1889)
"The women put [pikao] in a waka.. in which kiripokaka (pokaka bark) was steeping. This was to soften the pikao for pleating (whatu)." (Beattie 1994)
See Riley 1994 for information on medicinal uses of related plants elsewhere in the world.