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Xie Quan-zhong;Chen Xiao-ya Department of Biology, University of Nanjing 210008  
The genus Indosasa McClure is quite similar to the genus Acidosasa C.D. Chu et C. S. Chao. In their vegetaive morphology both are creepingbamboos with monopodial rhizomes and three branches at each culmnode.Particularly, the structure of florets is also similar with each other with6 stamens, 3 stigmas. Even the spikelets of two genera are superficialtyalike. But the inflorescence types of the two genera are different. Thatof Indosasa is iterauctant with pseudospikelets where as semelauctant withtrue spikelets in Acidosasa careful examinations of so called Indosasa lin-gchuanensis C. D. Chu et C. S. Chao and I. gegantea (Wen) Wen, werevealed that the two species have semelauctant inflorecence which is araceme composed of a small number of pedicellate spikelets. Therefore,those species should be transfered to Acidosasa as A. lingchuanensis (C. D.Chu et C. S. Cao) Q. Z. Xie et X. Y. Chen and A. gegantea (Wen) Q.Z. Xie et W. Y. Zhang.
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