And the dove came in to him in the evening; and, lo, in her mouth was a plucked off olive leaf: so Noah knew that the waters were abated from off the earth.
All Commentaries on Genesis 8:11 Go To Genesis 8
George Leo Haydock
Green leaves. The olive tree preserves its verdure and grows even at the bottom of the Red sea, and other seas in the East. (Pliny, Natural History xii. 25.)
Many other trees and seeds will live for a long time under the waters. (Calmet)
This tender branch of the olive seems to agree better with the spring than autumn; whence Tirinus infers, that the deluge began and ended in spring.