The experiment of the germination and growing of endangered species such as such as Euryale ferox, and the environmental education through those work study.

Euryale ferox是该属中唯一的物种，是一种非常大的睡莲，所有表面都有许多刺。Euryale ferox曾经是日本种植稻田的农民的一种有害植物。这种植物被认为是遗迹物种，在亚洲和日本的一些地区已经濒临灭绝。他们认为很难培育这一物种。但我试着培养这个物种作为教学材料。2003年8月至9月，我在日本南部的佐贺市收集了野生Euryale Ferox。经过2个月的培育，我成功地获得了549粒种子。以这些种子为试材，对其发芽条件进行了研究。种子需要储存在水中以防止发芽。冷藏(12℃，30天)和去盖处理后，13.3%的种子在室温或更高温度(20-26℃)下萌发。另一方面，没有冷处理，任何种子都不能发芽。冷处理时，不去盖子10%的种子发芽。我的实验表明，学校教师和学生使用这种植物作为教材并不是不可能的。

Euryale ferox, the only species in the genus, is a very large water lily covered with numerous spines on all surfaces. Euryale ferox used to be a harmful plant for farmers who cultivating rice field in Japan. This plant is considered to be relic species and in a fix of the extinction in some areas of Asia as well as Japan. They considered it is difficult to cultivate this species. But I try to cultivate this species for teaching materials. I collected wild Euryale ferox at Saga city, south part of Japan in August-September 2003. After 2 months of cultivation, I succeed to get 549 pieces of seeds. By using those seeds, I tried to study the conditions of sprout of Euryale ferox. Seeds need to store in water to prevent sprout. After cold processing (12C 30 days) and removing the operculum, 13.3% seeds of Euryale ferox sprout at room temperature and higher (20-26C). On the other hand, without cold processing no seeds could not sprout. With cold processing, without removing the operculum 10% seeds sprouted. My experiment revealed it is not impossible for school teachers and students to use this plant for teaching materials.