Radial drainage is a style in which streams radiate from a point like spokes on a wheel, and is common on young volcanoes. It's probably more accurate to think of to think of this as surficially controlled than structurally controlled. Still, volcanoes are structures, and I thought this was a lovely set of examples captured in one frame. The Volcanoes are Tolbachik (mid-left), Udina (lower center), and Zimina (upper right). (Thanks for catchng my mistake)
P. Kyle House, PhD., Surficial Geologic Mapping Specialist / Geomorphologist