What is "ristantia"

Ristantia is a group of plants in the family Myrtaceae described as a genus in 1982. The entire genus is endemic to the State of Queensland in Australia.

1. Ristantia gouldii Peter G. Wilson & B. Hyland - a tree species listed as vulnerable
2. Ristantia pachysperma (F.Muell. & F.M.Bailey) Peter G.Wilson & J.T.Waterh.
3. Ristantia waterhousei Peter G.Wilson & B.Hyland