苏铁(Cycas revoluta Thunb.)俗称铁树,为常绿木本植物,在我国南方大多以单株栽植于庭院,作观赏用。其叶可止咳,又是插花的装饰材料;种子有治痢、止血、通经等功效。苏铁为雌雄异株,在舟山市能正常生长,一般雄花一年开一次,雌花两年开一次。但由于栽培分散,雌雄花机遇很少,因此,很难采到种子。1983年春,我们在一株老母树上采得苏铁种子10公斤,共483粒,都很饱满,为桔红色,人们称为“凤凰蛋”(见图1)。由于 Cycas revoluta Thunb. Commonly known as Tieshu, is an evergreen woody plant, mostly in southern China planted in the courtyard of a single plant, for ornamental use. Its leaves can be cough, but also the flower decoration materials; seeds have diarrhea, bleeding, and other effects. Cycad is dioecious in Zhoushan City to normal growth, the general male flowers open once a year, female flowers bloom once every two years. However, due to scattered cultivation, male and female flowers rarely, therefore, it is difficult to adopt seeds. In the spring of 1983, we collected 10 kilograms of sesame seeds on a mother-and-mother tree, a total of 483 grains, all of which were full and orange-red. People called them “Phoenix eggs” (see Figure 1). due to