池杉优良无性系研究报告付雷，戴惠堂，冯慰冬（信阳林校）（鸡公山自然保护区）（河南省林科所）池杉原产美国密西西比河流域，多分布海拔３０ｍ以下的河漫滩地和沿海低洼湿地。河南省鸡公山自然保护区的池杉于１９２１年从美国引种，初栽于该保护区的李家寨林区。现保存... Research reports of excellent clones of Ipomoea yunnanensis Dai Weitang, Feng Weidong (Xinyang Forestry School) (Jigongshan Nature Reserve) (Henan Forestry Branch) Taxus originating in the Mississippi River basin of the United States, Coastal low lying wetlands. In 1921, Ipomoea japonica was introduced from the United States in Jigongshan Nature Reserve in Henan Province and was initially planted in the Lijiazhai Forest Area in the reserve. Save now ...