Molecular phylogenetic analysis suggests paraphyly and early diversification of Philadelphus (Hydrangeaceae) in western North America: New insights into affinity with Carpenteria
Yue-Long GUO, Andrew PAIS, Alan S. WEAKLEY, Qiu-Yun (Jenny) XIANG
J Syst Evol . 2013, (5): 545 -563 .  DOI: 10.1111/jse.12041