Here sago cycas trees blossom once every year 在这里，铁树一年一开花。
2.
Taxonomy of cycas in china : current status and perspective 中国苏铁属植物的分类学研究现状与展望
3.
Karyotypes and karyotypical evolution in five cycas species of china 5种国产苏铁的核型和核型进化
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Study on physiological characters of drought resistance , cold resistance and photosynthesis of cycas revoluta 抗寒及光合生理特性研究
5.
By the end of 1995 china had set up 175 zoological gardens and zoological exhibition sites in public parks , 227 artificial breeding centers for wild animals , more than 60 large botanical gardens and 255 wild plant gene and cell banks to ensure the continuation of rare and endangered species of plants and animals , including the giant panda , chinese alligator , chinese sturgeon , white - flag dolphin , manchurian tiger , crested ibis , cathay silver fir , dovetree , cycas revoluta and camellia chrysantha tuyama 到1995年底，中国共建动物园和公园动物展区175个、各种野生动物繁殖中心（场） 227个，建立大型植物园60多个、野生植物引种保存基地255个，使大熊猫、扬子鳄、中华鲟、白暨豚、东北虎、朱? 、银杉、珙桐、苏铁、金花茶等珍稀濒危动植物得到保护。
