A new series, Rigentes, of Eucalyptus (Myrtaceae) comprising three new species endemic to Western Australia
BROOKER, M.I.H. AND HOPPER, S.D.

A new taxonomic series, Rigentes, endemic to Western Australia is described. It comprises Eucalyptus rigens from north-west, north and north-east of Esperance, E. litorea from near Israelite Bay, both occurring around salt lakes, and E. famelica from east of Hopetoun, a species of subcoastal swamps. The series belongs in the informal Eucalyptus sect. Dumaria of Pryor & Johnson and is characterised by brown, somewhat flat to pyramidal seed, with the ventral side ribbed and dorsal side shallowly pitted.