title: [Microscopic identification study of western herbs. Part I: Three Echinacea-species roots].
abstract: OBJECTIVE
  To make microscopic identification research of three Echinacea-species roots recorded in the United States Pharmacopeia.
  
  
  METHODS
  The root transverse section and powder of E. angustifolia, E. pallida, and E. purpurea were observed. The main microscopic features were photographed.
  
  
  RESULTS
  The main microscopic features of transverse section and powder in three Echinacea-species roots are basically similar, except for some diagnostic differences. The results provide reliable reference for the authentication of raw materials of western herbal studies.
authors.affiliation: School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Li
authors.forename: Chu
authors.initials: C
authors.lastname: Chu
authors.forename: Zhenfeng
authors.initials: Z
authors.lastname: Tan
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Wang
authors.forename: Jiafu
authors.initials: J
authors.lastname: Wei
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.forename: Zhongzhen
authors.initials: Z
authors.lastname: Zhao
mesh_terms: D020900:Echinacea / Q000033:anatomy & histology / Q000166:cytology*; D008853:Microscopy; D018517:Plant Roots / Q000033:anatomy & histology / Q000166:cytology*; D014481:United States