New species of Commersonia J.R.Forst. & G.Forst. (Sterculiaceae) from eastern Australia and Vanuatu

Ten new species of Commersonia are described: Commersonia argentea, C. beeronensis, C. johnsonii, C. leiperi, C. pearnii, C. pedleyi, C. reticulata, C. rossii and C. viscidula from eastern Australia, and C. obliqua from Vanuatu. The new combination C. novoguinensis (Gilli) Guymer is made based on Disaster novoguinensis Gilli. The new subgenus Commersonia subgenus Verticillata Guymer is described for the species with deeply 3-lobed petaloid staminodes: C. fraseri, C. rossii, C. argentea, C. beeronensis and C. viscidula. An epitype is selected for C. bartramia. All new taxa are described and most illustrated, with notes on distribution, habitat and conservation status. An identification key to the Queensland species of Commersonia is provided.