she-oak

she-oak puhekieltä Any of various trees and shrubs of the family Casuarinaceae growing in Australasia and parts of Asia.
1985, (w), Illywhacker, Faber & Faber 2003, p. 96:

When she swung the belt again he crossed his fingers for her and screwed up his face in sympathy when it caught, in mid-air, on a branch of a big old she-oak that hung above the falls.