Siphocranion macranthum

Siphocranion macranthum is a species of flowering plant in the family Lamiaceae. It is commonly known as big-flower siphocranion and tong guan hua in China. It is a perennial herb that is native to Assam, Myanmar, Tibet, Vietnam, South China and East Himalayas. S. macranthum grows in subtropical evergreen and mixed forests.