intervale

{ } n. A tract of low ground between hills, or along the banks of a stream, usually alluvial land, enriched by the overflowings of the river, or by fertilizing deposits of earth from the adjacent hills. Cf. Bottom, n., 7. [ Local, U. S. ] [ 1913 Webster ]

The woody intervale just beyond the marshy land. The Century. [ 1913 Webster ]