Curcuma is a genus of about 80 accepted species in the plant family Zingiberaceae that contains such species as turmeric and Siam Tulip. The name comes from Arabic kurkum meaning "turmeric". Curcuma wenyujin Y. H. Chen Plants 0.8--1.6 m tall. Rhizomes yellowish inside, whitish outside, ovoid, robust, fleshy; roots fusiform tuberous at tip. Petiole ca. 30 cm; leaf blade oblong or ovate-oblong, 35--75 × 14--22 cm, glabrous, base subrounded or broadly cuneate, apex acute or shortly caudate. Inflorescences on separate shoots arising from rhizomes; peduncle 15--20 cm; spike 20--30 cm; coma bracts tinged with red, oblong, 5--8 cm, apex acute; fertile bracts green, ovate, 3--5 cm.
Two new unusual diterpenes, curcuminols D and E were isolated from the Radix of Curcumawenyujin. Phytochemical study on the ethanol extract of the radixes of Curcumawenyujin led to the isolation of three new compounds and a known compound. The new compounds were named curcuminol F curcuminol G  and curcuminoside.