Studies in the Cunoniaceae, II. The genera Caldcluvia, Pullea, Acsmithia, and Spiraeanthemum

A survey is given of the species of these genera: 1 Caldcluvia is a genus of 11 species and includes the formerly accepted genera Ackama, Spiraeopsis, Betchea, Stollaea, and Opocunonia. Ten new combinations are proposed to accommodate the species transferred from these genera. 2. The number of species recognised in Pullea is reduced to three; a new variety is described. 3. The new genus Acsmithia is segregated from Spiraeanthemum and comprises 13 species formerly included there and one new species. 4. Spiraeanthemum in its reduced circumscription now contains six species, of which one is described here as new and one is accepted to include two subspecies.