most common type of valley in the world
Valley A valley formed by flowing water, or river valley, is usually V-shaped. The exact shape will depend on the characteristics of the stream flowing through it. Rivers with steep gradients, as in mountain ranges, produce steep walls and a bottom. Shallower slopes may produce broader and gentler valleys. However, in the lowest stretch of a river, where it approaches its base level, it begins to deposit sediment and the valley bottom becomes a floodplain.
Lily of the valley Convallaria majalis is a native of Europe, where it largely avoids the Mediterranean and Atlantic margins.[7] An eastern variety, C. majalis var. keiskei occurs in Japan and parts of eastern Asia. A limited native population of C. majalis var. montana occurs in the Eastern United States.[8] There is, however, some debate as to the native status of the American variety.[9]