Curcuma is a perennial herbaceous plant of the family Zingiberaceae and Curcuma longa, with a plant height of 1 to 1.5m. The rhizome is well developed, the root is thick, and the end is swollen into a tuberous root; the leaves are oblong or oval, with short leaf tips. Acuminate; bracts ovate or oblong, light green, blunt apex, corolla light yellow; flowering period is August.

Turmeric likes a warm and humid climate, with plenty of sunshine and abundant rainfall. It is afraid of severe cold, frost, drought and stagnant water. Produced in China's Taiwan, Fujian, Guangdong, Guangxi, Yunnan, Tibet and other provinces and regions; widely cultivated in East Asia and Southeast Asia. Climate and soil: Warm and humid climate is suitable. Deep soil, well-drained, loose and fertile sandy loam is preferred.

Extended information

Character identification: Turmeric rhizome is irregular oval, cylindrical or spindle-shaped, often curved, with a dark yellow surface, rough texture, wrinkled texture and obvious links. , and there are circular branch marks and fibrous root marks. The texture is solid and not easy to break. The cross section is brown to golden yellow, horny and has a waxy luster. The endothelial layer has obvious ring patterns and vascular bundles are scattered in spots. The aroma and taste are bitter and pungent. The ones with solid quality, golden cross-section and strong aroma are better.

Microscopic identification: rhizome transverse section: more than 4 to 10 rows of corky cells on the outer side, often in the cortex, and sometimes epidermal and cortical cells can be seen outside. The cortex is broad, with leaf traces of vascular bundles; the endodermis is obvious. The pericycle consists of 1-2 rows of cells; the vascular bundles are limited in outer tough shape, more near the pericycle, and gradually less inward. The parenchyma cells of this product contain starch granules and brown pigment; there are oil cells scattered in the parenchyma tissue.