The specific epithet collaris means 'neck' and refers to the calyx of the fruit.

The papery leaves are oblong to lanceolate and measure up to 23 cm (9 in) long.

[3] Richetia collaris is endemic to central Sarawak on Borneo.

[1] Richetia collaris has been assessed as vulnerable on the IUCN Red List.

It is also threatened by expansion of land for plantations, including for palm oil and other tree species.