324 



41 .— CHRYSOPOGON. 



Key to species. 



Callus very long acicular ... ... 1. aciculatus. 



Callus not very long nor acicular ... 2. sinensis. 



1. C. aciculatus, Trin. ; Benth. Fl. Hongk. 424. Common in 



Hongkong ; at Fanling and elsewhere, Hongkong New 

 Territory ; Macao ; Pakhoi ; Lofoushan. Fl. June. 



2. C. sinensis, Rendle in Hemsl. Enum. PI. China, iii. 368. Pakhoi. 



Fl. July. 



42.— SORGHUM. 

 Key to species. 



1. Joints, pedicels and callus shortly villous 



with purple or rufous hairs ... \. fulvum. 



Joints, pedicels and callus shortly villous 



but not with purple or rufous hairs 2. 



2. Rachis of spike tenacious ... ... 2._vulgare. 



Eachis of spike fragile .. . ... ... 3. halepense. 



1. S. fulvum, Beauv. ; Andropogon tropicus, Spreng. ; Benth. Fl. 



Hongk. 423. Near filter beds, Kowloon, Hongkong New 

 Territory ; Canton. Fl. August. 



2. S. vulgare, Pers. ; Andropogon Sorghum, Hack. ; Stapf in 



Hook. f. Fl. Brit. Ind. vii. 184. Waste ground near 

 Canton ; Lienchow River. Fl. August. 



3. S. halepense, Pers. ; Andropogon halepensis, Brot. ; Hook. f. 



1. c. 182. Mt. Gough, Hongkong ; Lienchow liiver ; 

 North River. Fl. August. 



43.— THEMEDA. 



Key to species. 



Involucrant spikelots inserted on a level 1. triandra. 

 Involucrant ^pikelets in superposed pairs 2. gigantea. 



1. T. triandra, Forsk. ; Anthistiria imberbis, Retz. ; Hook. f. Fl. 



Brit. Ind. vii. 211. Lienchow River. Fl. August. 



2. T. gigantea, Hack. ; Anthistiria gigantea, Cav. ; Hook. f. 1. c. 



216. Castle Peak, Hongkong New Territory ; common 

 on the hills near Canton. Fl. May to October. 



44.— PSEUDANTHISTIRIA. 

 1. P. heteroclita, Hook.f. 1. c. 219. Hongkong. Fl. November. 



45.-GERMAINIA. 



1. G. capitata, Bui. et Poitr. ; Hack, in DC. Mouogr. Phan. vi. 686, 

 White Clond hills, Canton. Fl. Septemher, 



