(from the article `cycadophyte`) ...Lomaria. Stangeria leaves and those of the recently described Chigua are unique in possessing pinnately veined leaflets with midribs and side ... ...extent of division in fern leaves, or fronds, ranges from that in which the leaf margins are merely so deeply lobed as to have narrow-based ... [2 rel... Found on http://www.britannica.com/eb/a-z/p/70