Eleanor Marion Bennett was a collector of the species of the genus that dominates the trees of what continent?
Eleanor Marion Bennett:  She collected Eucalyptus species in the south-west of Western Australia and published a revision of the genus "Hybanthus" in 1972. Eucalyptus:  Members of the genus dominate the tree flora of Australia, and include "Eucalyptus regnans", the tallest known flowering plant on Earth.
Australia