Thalamia cupressina Spreng Dacrydium cupressinum, commonly known as rimu, is a large evergreen coniferous tree endemic to the forests of New Zealand.

The Māori name rimu comes from the Polynesian term limu which the tree's foliage were reminded of,[3] ultimately from Proto-Austronesian *limut meaning "moss".

[8] Māori originally used the resinous heartwood of rimu (called māpara or kāpara) for wooden items such as heru (combs) and fernroot beaters.

[9][10] Historically, rimu and other native trees such as kauri, mataī and tōtara were the main sources of wood for New Zealand, including furniture and house construction.

[11] Although slow to establish, with a long juvenile period and fairly high moisture requirements, rimu is widely grown as an ornamental tree in New Zealand.

It is attractive at all growth stages, usually quite narrow when young, then developing into a broader tree with weeping branches before finally progressing to its more upright adult form.

While rimu does exhibit some variation in the wild, garden cultivars are largely unknown, except for one recent introduction, 'Charisma', which is a compact, golden-foliaged form.