title: [Floral dynamic and pollination habit of Fritillaria cirrhosa].
abstract: OBJECTIVE
  To find the sexual reproduction characteristics and improve the seed propagation and new variety breeding of Fritillaria cirrhosa.
  
  
  METHODS
  Flower, anther and pistil development were observed. Pollinating in different development period and bagging were used to measure stigma maturity situation and natural outcrossing rate.
  
  
  CONCLUSIONS
  It took 12 days from floral bud emergency to finished flowering. It was observed that anther opened in longitudinal direction and pollen was ejected for 2-4 days continuously. Pistil matured earlier, and chapiter could be fertilized from middle bud stage the third day after flowering, but the most suitable time was 2-3 day after the corolla opening. The natural outcrossing rate was 81.9%. F. cirrhosa is a typical xenial plant.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
authors.forename: Shaofa
authors.initials: S
authors.lastname: Zhang
authors.forename: Jianhe
authors.initials: J
authors.lastname: Wei
authors.forename: Shilin
authors.initials: S
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Dai
authors.forename: Xiwen
authors.initials: X
authors.lastname: Li
mesh_terms: D035264:Flowers / Q000502:physiology*; D031410:Fritillaria / Q000502:physiology*; D054817:Pollination / Q000502:physiology*