321 



33.— ARTHRAXON. 



1, A. ciliaris, Beauv. ; Hook. f. Fl. Brit. Ind. vii. 145. Victoria 

 Peak and Mt. Gougli, Hongkong ; Castle Peak, Hongkong 

 New Territory ; hills near Chaochaufu ; Canton ; Whampoa. 

 Fl. April — September. 



33.— ROTTBOELLIA. 



Key to species. 



1. Back of sessile spikelet conspicuously 



tessellated .... 1. molhcoma. 



Back of sessile spikelet not con- 

 spicuously tessellated 2. 



2. Spikes compressed ; slender plant with 



glabrous leaves ... ... ... 2. compressa. 



Spikes cylindric ; large coarse plant 



with usually hairy leaves 3. exaltata. 



1. R. mollicoma, Hmice in Journ. Bot. 1871, 134. Whampoa; 



Lofoushan. Fl. August — October, 



2. R. compressa, Linn. f. ; Hook. f. Fl. Brit. Ind. vii. 153. 



Aberdeen, Hongkong ; Canton. Fl. July. 



3. R. exaltata, Linn. f. ; Hook. f. 1. c. 156. Little Hongkong 



and Aberdeen, Hongkong ; Lantao Island, Hongkong New 

 Territory; Whampoa; Macao; Lienchow River. Fl. August. 



34.— OPHIURUS. 



1. 0. monostaehyus, J. S. Pred ; Benth. Fl. Hongk. 417. Hong- 

 kong without locality. Fl. October. 



35.— MANISURIS. 



1. M. granularis, Linn.; Hack, in Df). Monogr. Phan. vi. 314. 

 Whampoa ; Lienchow River. Fl. August. 



36.— EREMOOHLOA. 



Key to species. 



Outer glume not winged, fringed with 



bristles ... ... ... ... 1. leersioides. 



Outer glume winged at top ... ... 2. ophiuroides. 



I. E. leersioides, Hack. ; Ischaemum leersioides, Munro ; Benth. 



Fl. Hongk. 425. Aberdeen, Hongkong ; Kowloon catch- 



water,Castle Peak and Kuntong, Hongkong New Territory ; 



Canton ; Whampoa ; Sam Cock's Island near Macao ; 



West River. Fl. August. 

 2. E. ophiuroides. Hack. ; Ischaemum ophiuroides, Munro ; Benth. 



I.e. 425, Cape d'Aguilar, Hongkong; Whampoa. Fl. August., 



21515 X 



