Study on the Pharmacognosy of Echinacea purpurea
ZHONG Ying-jie1,2, ZHANG Hui-mei2, FU Hai-ning2, ZHOU Feng-qin1, GUO Qing-mei1*
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2015, (2): 321 -327 .  DOI: 10.16333/j.1001-6880.2015.02.025