McLewin & Chen (2006) Peony rockii and Gansu Mudan
Lan Guan Yu Dai breeder, date: Chen Fuhui between 2003 and 2005 engl. translation: Blue Crown Jade Belt color & form classification categories , remarks: 4.5.28, Vigorous not online: 174
Li Jiajue 2005, Chinese Tree Peony, Xibei, Xinan, Jiangnan Volume
'Languan Yudai' Crown form, light blue. Selected, cultivated and named by Chen D.Z.. [detailed description available on page 133]
Cheng Fangyun: 'Chinese Flare Mudan' (Beijing 2005)
'Lan Guan Yu Dai' description (in chinese) & picture available on page 149.
