THE PLOBA HONGKONGElirSlS. 48 



In dry, sandy and gravelly places. Pound also in the Indian 

 peninsula, Ceylon, and the Malay archipelago. 



44. Cyperus nigro-viridis, Thw. Emm. PI. Zeyl. 345. 



Found in Hongkong by the late Dr. Harland, and on the adja- 

 cent continent by myself. A native also of the Indian peninsula 

 and Ceylon. 



•Cyperus peimatus, Lam„ 



is, according to Mr. Kurz (Joiirn. As. Soc. Beng. xxxix. 85), 

 Heyne's O. palUdus ; and if so, the name is very good. The plant 

 taken for this by Eseubeck (Wight, Contrib. 79), according to a 

 specimen from Dr. Thwaites (C. P. 3559), is quite different, and 

 the name is not appropriate to it. 



45. Scirpus plantagineus, Rottb. (=EIeocharis plantaginea, R. Br.; 

 Kunth, Enum. Plant, ii. 163; Steud. Syn. PI. Cyp. 82.) ♦ 



In ditches on the racecourse, Happy Valley, plentiful ; gathered 

 by me in November 1862. Found in India, Ceylon, the Malayan 

 islands, Madagascar, and Japan. I found this plant growing in 

 aea-sand on the Island of Ku lung su, Amoy. 



46. Scirpus (Eleochaxis) laxiilorus, Thw. Enum. PI. Zeyl. 435. 



In the swamp in the Happy- Valley woods ; gathered by Mr. 

 Sampson in July 1866 and October 1868. Only known besides 

 from Ceylon. 



#Scirptls barbatus, Rottb. (=Isolepis barbata, R. Br.; Benth. Fl. 



Hongh. 393.) 

 *Scirpus supinus, lAnn. (=Isolepis supina, ii. Br. ; Benth. Fl. Hangk. 



394.) 

 Bentham and, follovnng him, Thwaites retain Isolepis as a genus, 

 whilst uniting Xlleocharis with Scirpus ; but, of the two, MleocJmris 

 has unquestionably the higher claim to be kept separate, gharac- 

 ters derived from the style being more constant and of greater 

 value than the presence or absence of hypogynous setae ; and both 

 Parlatore and Asa Gray admit it to generic rank while merging 

 Isolepis in Scirpus. Q-risebach, probably with more justice, reduces 

 MmhristyUs even to Scirpus ; for F. capillaris, A. Gray, has about 

 equal claims to rank with Isolepis. 

 *Fiinbristylis rigidula, Nees in Wight, Contrib, 99 ; Steud. Syn. PI. 



Cyp, 116. (=F.diphylla, Vahl, var. ? leptophylla, Benth. Fl. Songh. 



392.) 

 Hongkong specimens, determined by Mr. Bentham himself, are 

 certainly identica,l with Dr. Thwaites's C. P. 3232. 



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