In order to investigate the floral diversity of germplasm resources of L.pumilum, domestic resources of L.pumilum were planted and observed. The results showed that here were certain discrepancies among twenty five L.pumilum populations. The discrepancies were mainly concerned with those flowers With or without hair bud, petals wide, anti-curl of petals and flower color, etc. There were significant or very significant correlation between the characters of flower diameter, anther length and the geographical factors（longitude, latitude, elevation）. According to the main floral traits of 25 populations L.pumilum, it can be clustered into 5 groups. The geographical location and altitude were correlated with clusters based on floral traits.