Alstonia costata, synonyms including Alstonia marquisensis, is a species of flowering plant in the family Apocynaceae, native to the Solomon Islands in Papuasia and to islands in the south Pacific.

[1] It was first described by Georg Forster in 1786 as Echites costatus.

[2] It grows as a shrub or tree.

[1] Alstonia costata is native to the Solomon Islands in Papuasia; the Cook Islands, the Marquesas Islands and the Society Islands in the south-central Pacific; and Fiji, New Caledonia, Samoa, the Santa Cruz Islands, Tonga, and Vanuatu in the south-western Pacific.

This Apocynaceae article is a stub.