一、开花结实观察1970年3月开始,对池杉的开花结实习性进行了观察记载,了解到池杉是雌雄同株而异花的。三至四年生实生苗开始出现了少数雌花,五至六龄雌花增多,并开 First, the flowering and fruiting observation began in March 1970, on the flowering and staring habit of Ipomoea cynocephala was recorded and learned that Icteroensis is monoecious and cross-flowering. Three to four-year-old seedlings began to appear a few female flowers, five to six female flowers increased, and opened