Rumduol refers to a flowering plant belonging to the Annonaceae family. It is native to Southeast Asia and is known by various names in the region, including lamduan in Thai.
The plant is widely cultivated as an ornamental species. It holds significant cultural status as the national flower of Cambodia and serves as the provincial flower for Sisaket province in Thailand. In botanical classification, some sources consider it to be the same species as Sphaerocoryne affinis.