Term (also claw, wreath, noodle, spandrel, angle) for the fastening organs of the vine. The vine belongs to the group of climbing plants whose natural supports are other plants, slender ascending woody plants but also hanging climbing plants (lianas). The tendrils are a transformed grape stem structure, the panicle of the inflorescence (clusters or later grapes). They are also closely related to the clusters. This is shown by the mixed forms that occur, because side branches of the tendril can have some flowers and those of the clusters can have tendrils. At the node of the shoot they are always opposite the leaf. In the European varieties (species Vitis vinifera) the tendril sequence is discontinuous (with spatial interruptions). This means that in the node sequence on the shoot, two tendril-bearing nodes are followed by a node without a tendril. They are forked with two to four branches.