Curcuma alismatifolia, Siam tulip or summer tulip (Thai: ปทุมา, pathuma, or ดอกกระเจียว, dok krajiao) is a tropical plant native to northern Thailand and Cambodia. Despite its name, it is not related to the tulip, but to the various ginger species such as turmeric. It can grow as an indoor plant, and is also sold as cut flowers.
^Nakayama, M; Roh, MS; Uchida, K; Yamaguchi, Y; Takano, K; Koshioka, M (2000). "Malvidin 3-rutinoside as the pigment responsible for bract color in Curcuma alismatifolia". Bioscience, biotechnology, and biochemistry64 (5): 1093–5. PMID10879491.