References
- Hooker, Joseph Dalton; J. F. Cathcart and W. H. Fitch (1855). Illustrations of Himalayan plants. London: L. Reeve. pp. 93–95. LCCN 05024640.
- T. Iwashina and 5 others (April 2004). "Flavonoids in translucent bracts of the Himalayan Rheum nobile (Polygonaceae) as ultraviolet shields". Journal of Plant Research 117 (2): 101–107. doi:10.1007/s10265-003-0134-2. PMID 14749969.
- Tsukaya, Hirokazu (February 2002). "Optical and anatomical characteristics of bracts from the Chinese "glasshouse" plant, Rheum alexandrae Batalin (Polygonaceae), in Yunnan, China". Journal of Plant Research 115 (1): 59–63. doi:10.1007/s102650200009.
Read more about this topic: Rheum Nobile