title: [Identification characters of leaf venation of Bidens pilosa with its confused herb Bidens pilosa var. radiata].
abstract: OBJECTIVE
  To study the leaf venation characteristics of Bidens pilosa and B. pilosa var. radiata and establish an identification method.
  
  
  METHODS
  LMVP (leaf morphological-venation pattern for identification Chinese herbs), and QAERM (quantitatively analyze and evaluate reliability for the method of identification Chinese herbs) were applied for the study.
  
  
  RESULTS
  Under the transmission-light, the tertiary vein of B. pilosa was discrete, the color was darker, the size was bigger, the shape was short curve, short linear, spot-like and branch-like. However the tertiary vein of B. pilosa var. radiata was continuous linear and color lighter. With the mentioned key difference, the both plants could be successfully identified from each other, the accuracy of identification results (AC) was from 96.7% to 97.7%. The repeatability of identification results: agreement rate for observation (ARO) was 95.1% and Kappa value was 0.90.
  
  
  CONCLUSIONS
  The established method is simple, rapid, economic and reliable.
authors.affiliation: Faculty of Pharmacy, Traditional Chinese Medical College of Guangxi, Nanning, China. hebaozuo@yahoo.com.cn
authors.forename: Baozuo
authors.initials: B
authors.lastname: He
authors.forename: Jing
authors.initials: J
authors.lastname: Zeng
authors.forename: He
authors.initials: H
authors.lastname: Wei
authors.forename: Guizhi
authors.initials: G
authors.lastname: Lu
authors.forename: Yuekui
authors.initials: Y
authors.lastname: Liao
mesh_terms: D031176:Bidens / Q000033:anatomy & histology* / Q000737:chemistry; D010858:Pigmentation; D018515:Plant Leaves / Q000033:anatomy & histology* / Q000737:chemistry