koehne mountain ash (sorbus koehneana) turning it's leaves bright red and bearing white fruits

defoliation fall koehne mountain ash sorbus koehneana anthocyanin autumn background beautiful biology botany bright carotenoid changing chlorophyll close colorful colours environment fallen foliage fruits green leaf leaves nature orange outdoors pattern peaceful perfection plant red season shedding shrub tanin tree vibrant wallpaper warm white yellow turning it's later bearing pigments