It was described as full species by Tommaso Salvadori in 1891, but subsequently it has been regarded as subspecies of the red-crowned parakeet.

[2] Pending molecular analysis, Christidis & Boles (2008) have suggested on biogeographical grounds that the taxon is likely to be most closely related to the Norfolk Island green parrot (Cyanoramphus cookii), as either a subspecies of what they have tentatively called the Tasman parakeet (Cyanoramphus cookii subflavescens), or possibly a full species (Cyanoramphus subflavescens).

[4] The Lord Howe parakeet was a medium-sized green parrot with a crimson cap and eye-stripe.

Measurements of specimens indicate that it was slightly larger than the nominate subspecies, as well as having yellower plumage and less extensive red markings on the head.

[5] The parrot was formerly abundant on the island, but was persecuted by the early settlers there because of its raids on their crops and gardens.