Exploring the origin of the latitudinal diversity gradient: Contrasting the sister fern genera Phegopteris and Pseudophegopteris
Harald SCHNEIDER, Li-Juan HE, Jeannine MARQUARDT, Li WANG, Jochen HEINRICHS, Sabine HENNEQUIN, Xian-Chun ZHANG
J Syst Evol . 2013, (1): 61 -70 .  DOI: 10.1111/j.1759-6831.2012.00234.x