Nine families of mainly wind-pollinated plants are described in this volume. They range in size from the herbaceous nettles (Urticaceae) to the She-Oaks (Casuarinaceae), and in distribution from the tropics to temperate rainforests and even arid zone woodlands. Some families such as Betulaceae and Ulmaceae (Elms) contain mainly introduced species, while others like Moraceae (Figs) are mainly native.
The largest family is Casuarinaceae with 66 species, mostly in the genus Allocasuarina (She-Oaks). Moraceae has 47 species in 7 genera, including the Figs. Urticaeae, the nettle family, contains 21 species in 9 genera.
The other six families have fewer than 10 species each, but include both tropical and temperate rainforest plants as well as naturalised species.
This volume covers 9 families, 31 genera and 153 species. 32 new taxa are described, as well as many new combinations and lectotypifications.