Autumn leaf color
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Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. The phenomenon is commonly called autumn colours or autumn foliage in British English and fall colors, fall foliage, or simply foliage in American English.
In this leaf, the veins are still green, while the other tissue is turning red. This produces a fractal-like pattern
A North American leaf with multiple colors across it
Cross-section of a leaf showing color changes
Autumn coloration at the Kalevanpuisto park in Pori, Finland.
Deciduous
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In the fields of horticulture and botany, the term deciduous means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit. The antonym of deciduous in the botanical sense is evergreen.
Like a number of other deciduous plants, Forsythia flowers during the leafless season.
Deciduous plants in mid- to high latitudes shed their leaves as temperatures drop in autumn.
Deciduous trees were introduced to the temperate regions of Australia where they are used as ornamental plants, as seen here at a suburban street in Sydney.
Dry-season deciduous tropical forest