Determination of the wind pollination distances and flowering characteristics of Hippophae rhamnoides L.ssp. sinensis Rousi (Elaeagnaceae) Flowering characteristics and pollination biology of rare and endangered Kolkwitzia amabilis Spike Differentiation and Flowering Characteristics in Tall fescue Floral syndrome and breeding system of Erigeron breviscapus Flowering characteristics and pollination ecology of Scabiosa tschiliensis Breeding System and Pollina tion Ecology in J a tropha cu rcas Flowering Characteristics and Breeding System in Camptotheca acuminata Decne Flowering Characteristics and Chemical Control of the Buds of Arceuthobium sichuanense Preliminary Study on Floral Syndroma and Breeding System for Five Species of Rehmannia (Scrophulariaceae)