Strawberry
The strawberry is the symbol of perfect righteousness or the emblem of the righteous man whose fruits are good works. When shown with other fruits and flowers, it represents the good works of the righteous or the fruits of the spirit. The strawberry is occasionally shown accompanied by violets to suggest that the truly spiritual are always humble.
Orange
The orange tree is regarded as a symbol of purity, chastity, and generosity. Thus it is occasionally depicted in paintings of the Virgin Mary. The orange tree was sometimes used instead of the apple tree or the fig tree in scenes showing the fall of man.
Olive
The olive is a true Biblical tree. Its rich yield symbolized the providence of God towards His children. The olive branch has always been regarded as a symbol of peace, and appears as such in allegorical paintings of Peace.
Willow
The willow continues to flourish and to remain whole, no matter how many of its branches are cut.
Clouds
Clouds in the heavens are the natural veil of the blue sky, and are, therefore, used as the symbol of the unseen God. Cloud is the most common symbol of Divine Omnipotence.
Earth
The earth which produces plants and trees and furnishes a habitation for man, is often used as a symbol for the Church, which feeds man with spiritual faith and offers him shelter.