Isn't that the "ostrich plume" lace stitch pattern? With lovely color changes? Or maybe it's "feather and fan". Can't really tell but definitely one or the other. Looks kinda like it's one of those with a cable in between or something or a plain st st panel with purls on the side and the lace panels in between.
Wait a tic.... think I at least found the lace pattern that is for that shawl... here it's the dark purple section...http://elann.com/ShowFreePattern.asp?Id=129024