title: [A study on pollen morphology of Dipsacus].
abstract: OBJECTIVE
  To study the pollen morphology of Dipsacus L. produced in China.
  
  
  METHODS
  Examining the pollen morphology of 17 species and 2 varieties of Dipsacus L. with light microscope and scanning electron microscope.
  
  
  RESULTS
  The shape of pollen grains is spheroidal and the aperture is tricolpate. The ornamentation of exine may be divided into 3 types: dispinulate-reticulate, dispinulate-foveolate, dispinulate-rugulate or nearly smooth.
  
  
  CONCLUSIONS
  Dipsacus is a natural class group, and the slight difference of its pollen grains is useful to some extent in the division of species.
authors.affiliation: Institute of Chinese Materia Madica, China Academy of Traditional Chinese Medicine, Beijing 100700, China.
authors.forename: X F
authors.initials: XF
authors.lastname: Feng
authors.forename: T M
authors.initials: TM
authors.lastname: Ai
authors.forename: H N
authors.initials: HN
authors.lastname: Xu
mesh_terms: D019684:Magnoliopsida / Q000033:anatomy & histology* / Q000145:classification / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D011058:Pollen / Q000033:anatomy & histology* / Q000648:ultrastructure; D013045:Species Specificity