revolute

a. [ L. revolutus, p. p. of revolvere. See Revolve. ] (Bot. & Zool.) Rolled backward or downward. [ 1913 Webster ]

☞ A revolute leaf is coiled downwards, with the lower surface inside the coil. A leaf with revolute margins has the edges rolled under, as in the Andromeda polifilia. [ 1913 Webster ]