LI Xin-hua
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaZHOU Wen
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaGUO Jia-cheng
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaJIA Shuang
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaHUANG Si-yu
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaFrom April to June in 2019, a naturalized population of Opuntia cespitosa was first found at Qiushan Hill, Guozhuang Town, Jurong City, southwestern Jiangsu. The population mainly occurs on an abandoned quarry at elevations of 46-90 m, covering an area of ca. 13.26 hm2, 510 m long from east to west, and 260 m wide from north to south. A total of 910 mature shrubs bearing flowers and fruits have been recorded there, among which the longest axis of the largest shrub consists of 10 continuous cladodes, indicating an age of 10 years, which probably appeared at Qiushan Hill in 2010. This naturalized population may be derived from the pot plants of O. cespitosa, which were possibly discarded in situ by the staff of Qiushan quarry, when the quarry became abandoned. The morphological features are compared between O. cespitosa and known other four naturalized species of Opuntia in China, and a key to these species is prepared. Furthermore, the dispersal mechanisms and its invasion risk of O. cespitosa are also discussed.
李新华,周闻,郭嘉诚,贾霜,黄思雨.二色仙人掌，中国仙人掌科一新归化种[J].热带亚热带植物学报,2020,28(2):192~196
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