西峡县油桐多属三年桐(Aleurites fordii Hemsl).是雌雄同株异花授粉植物,在长期的生产过程中,由于人工自然选择的结果,形成了一些地方品种:如股爪青、五爪桐、叶里藏等,其中股爪青是最好的一个,它分布最广,西峡、内乡、固始等县调查占总株数的88.5%.种子播种后,三年开始结果,七年可以大结,盛果期达15-20年,管理的好25年仍能大量结果,成片林 In Xixia County, Aleurites fordii Hemsl is a hermaphrodite flower pollination plant. In the long-term production process, some local cultivars are formed as a result of artificial natural selection: Five clawed tongs, leaves hidden possession, among them claw green is the best one, it is the most widely distributed, Xixia, Neixiang, Gushi County survey accounted for 88.5% of the total number of trees .Seed sowing, the results of three years , Seven years can be summarized, Sheng fruit period of 15-20 years, 25 years of management is still a lot of results, into a piece of forest