Object To determine the histochemical location d eposited artemisinin and to provide selection character for screening of Artemisia annua L. which contains rich content of artemisinin Methods Artemisinin was located by the histochemic al method and then statistical method was used to ascertain the correlation betw een the content of artemisinin and the density of biseriate glandular triche mes (BGT) Results Artemisinin is located in both BGT and non glandular T -shaped filamentous trichomes (NTFT) in A annua leave s The content of artemisinin had a positive correlation with the density of BG T in A annua leaves Conclusion High density of BGT in foliar tissue might be considered as one of the selection characters for the screening of A. annua with rich content of artemisinin