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TWO NEW FORMS OF POPULUS FROM HENAN PDF

2 Pages·1998·0.08 MB·English
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植   物   研   究 BULLETIN OF BOTANICAL RESEARCH 第18卷 第3期 1998年 7月 Vol.18 No. 3 July, 1998 河南杨属二新变型 赵天榜 宋留高 陈志秀 (河南农业大学,郑州 450002) 关键词 杨属;圆叶齿叶山杨;紫叶波叶山杨 TWO NEW FORMS OFPOPULUS FROM HENAN Zhao Tian- bang Song Liu- gao  Chen Zhi- xiu (Henan Agricultural University, Zhengzhou, Henan) Key words Pupulus; P. serrata T. B. Chao et J. S. Chen f. rotundata T. B. Chao et Z. X. chen; P. undulata J. Zhang f. purpurea T. B. Chao et Z. X. Chen. 1. 圆叶齿叶山杨 新变型 Populusserrata T. B. Chan et J. S. Chenf. rotundata T. B. Chao et Z. X. Chen, f. nov. A typo recedit ramis ramulisque pendulis. foliis rotundatis 5- 8cm longiset 5- 8cm latis apice obtusis basi rotundatis vel subrotundatis margine basim integris supra medium aeque grosse crenatis, petiolis gracilibus 6- 10 cm longis pendulis. Henan: Nanzhao Xian. Baotianman. 5. 11. 1983. T. B. Chao et al. No. 831156. Typus in Herb. Henan Agricultural University. 本新变型与原变型区别:侧枝和小枝均下垂。叶圆形或近圆形,长5— 8cm,宽 5— 8 cm, 先端钝圆,基部圆形或近圆形,边缘基部全缘,中部以上具整齐粗圆齿;叶柄纤细,长6— 10 cm,下垂。 河南:南召县。宝天山曼。1983年11月5日。赵天榜等 No. 831156。模式标本,存河南农业大 学。 2. 紫叶波叶山杨 新变型 Populusundulata J. Zhang f. purpurea T. B. Chao et Z. X. Chen, f. nov. 收稿日期: 1997- 3- 10 288 植  物  研  究               18卷 A typo recedit ramis ramulisque pendulis. foliis rotundatis vel subrotundatis charta- ceis 4- 8cm longis et 4- 8cm latis, apice acutis, basi rotundatis vel subcuneatis margine basim integris supra medium repandis, petiolis gracilibus pendulis. ramulis foliis peti- olisque juvenilibus atropurpureis pluries longiturnitibus 40- 60diebus, postea atto- viri- descentibus nitidis. femineis! Henan: Neixiang Xian. Baotianman. alt. 1300 m. 10. 6. 1990. T. B. Chao No. 906103. Typusin Herb. Henan Agricultural University. 本新变型与原变型区别: 侧枝和小枝下垂。叶圆形或近圆形,纸质,长4— 8 cm,宽4— 8 cm,先端急尖,基部圆形或近心形,边缘基部全缘,中部以上波状缘;叶柄纤细,下垂。幼枝、 幼叶、幼叶柄暗紫色,通常持续40— 60天,后变为暗绿色,具光泽。雌株! 河南: 内乡县。宝天山曼。海拔1300 m。1990年 6月10日。赵天榜 No. 906103。模式标本,存 河南农业大学。 Populusundulata J. Zhang in Forest Res., 1988, 1(1): 68; Populusserata T. B. Chao et J. S. Chem in Forest Res.,1988, 1(1): 69.

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