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吉林省延边地区汪清县大兴沟镇和盛村附近和盛组中首次采获大量植物化石:Lepidophyl-loides sp.,Stigmaria ficoides (Sternb.) Brongn.,Trizygia oblongifolium (Germ.et Kaulf.) Asama,Calamites cistii Brongn.,C.sp.,Paracalamites stenocostatus Gu et Zhi,Annularia stellata (Schloth.) Wood,A.sp.,Schizoneura sp.,Sphenopteridium pseudogermanicum (Halle) Sze,Sphenopteris rotunda Sze,Pecopteris arborescens(Schloth.)Sternb.,P.candolleana Brongn.,P.cyathea (Schloth.) Brongn.,P.huichensis Hsü,P.marginata Gu et Zhi,P.cf.P.(Asterotheca) orientalis (Schenk) Pot.,P.yabeiKaw.,P.sp.,Neuropteris ovata Hoffm.,N.plicata Sternb.,Odontopteris subcrenulata (Rost) Zeill.,Taeniopteris cf.T.multinervis Weiss,T.yernauxii Stockm.et Math.,Emplectopteris sp.,Cordaites principalis (Germ.) Gein.,C.schenkii Halle,Cardiocarpus sp.,Rhabdocarpus sp.,Radicites sp.,计18属30种,具有华夏植物群性质,时代为早二叠世晚期(亚丁斯克—空谷期早期)。和盛植物群的发现使华夏植物群分布范围向北扩展到汪清大兴沟地区,延边地区华夏植物群与安加拉植物群的区系界线应位于汪清—珲春一线;西拉木伦河缝合带在延边地区的东延很可能位于该线附近。
Lepidophyl-loides sp., Stigmaria ficoides (Sternb.) Brongn., Triziagia oblongifolium (Germ.et Kaulf.) Asama, Calamites cistii Brongn., C.sp., Paracalamites stenocostatus Gu et Zhi, Annularia stellata (Schloth.) Wood, A.sp., Schizoneura sp., Sphenopteridium pseudogermanicum (Halle) Sze, Sphenopteris rotunda Sze, Pecopteris arborescens P. cyathea (Schloth.) Brongn., P. huichensis Hsü, P. marginata Gu et Zhi, P. cf.P. (Asterotheca) orientalis (Schenk) Pot., P. yabei Kaw , P. sp., Neuropteris ovata Hoffm., N. plicata Sternb., Odontopteris subcrenulata (Rost) Zeill., Taeniopteris cf.T. multinervis Weiss, T.yernauxii Stockm.et Math., Emplectopteris sp., Cordaites principalis ( Germ., C. chenkii Halle, Cardiocarpus sp., Rhabdocarpus sp., Radicites sp., 18 genera and 30 genera, which have the characteristics of Huaxia flora. The age was Early Early Permian (Aden- . The discovery of Hesheng flora extends the distribution of Huaxia flora northwards to the area of Daxinggou in Wangqing. The boundary of the flora of Huaxia and Angara in Yanbian should be located in Wangqing-Hunchun line. East Yan extension in Yanbian is likely to be located near the line.