Molecular evidence for natural hybridization between Rhododendron spiciferum and R. spinuliferum (Ericaceae)
Li-Jun YAN, Lian-Ming GAO, De-Zhu LI
Journal of Systematics and Evolution . 2013, (4): 426 -434 .  DOI: 10.1111/j.1759-6831.2012.00243.x