322 



37.— ISCHAEMUM. 

 Key to species. 



1. Margins of outer glume of sessile 



spikelet broadly incurved below 



middle 1. ciliare. 



Margins of that glume narrowly inflexed 



throughout ... ... ... 2. 



2. Outer glume closely transversely ridged 2. rugosum. 

 Outer glume nearly flat, nodular at edge 3. aristatum. 



1. I. ciliare, Retz. ; Spodiopogon obliquivalvis, Nees ; Benth. Fl. 



Hongk. 426. Mt. Victoria and Botanic Gardens, Hong- 

 kong ; Kuntong, Castle Peak, Kowloon catchwater, Lantao 

 Island, Cape Syngmoon (Capsuimun), Hongkong New 

 Territory ; hills near Canton ; Lofoushan ; Ookaisa ; 

 Pakhoi. Fl. September. 



2. I. rugosum, Salisb. ; Hook. f. Fl. Brit. Ind. vii. 127. Whampoa ; 



Pakhoi ; Lienchow River. Fl. October. 



3. I. aristatum, Linn. ; I. barbatum, E,etz. ; Benth. Fl. Hongk. 



425. Victoria Peak and Aberdeen New Road, Hongkong; 

 Lantao Island, Kuntong and Taipo Eoad, Hongkong New 

 Territory ; Canton ; Macao ; Pakhoi ; North River. Fl. 

 September. 



38.— HETEROPOGON. 



1. H. contortus, Beauv. ; H. hirtus, Pers. ; Benth. 1. c. 424. 

 Pokfulam Road, Aberdeen, Little Hongkong and Mt. 

 Victoria, Hongkong ; Kuntong, Fotaumun, Hongkong 

 New Territory ; Canton ; Whampoa. Fl. September. 



39.— ANDROPOGON. 



Kej' to species. 



1. Pedicel of spike enclosed in spathiform 



leaf-sheaths ... ... ... 2. 



Pedicel of spike not enclosed in spathi- 

 form leaf -sheaths ... ... ... 3. 



2. Pedicelled spikelet smaller than sessile 4. 

 Pedicelled spikelet greater than sessile 1. fastigiatus. 



3. Rachis and pedicels of upper spikelets 



with translucent channel ... ... 6. 



Rachis and pedicels of upper spikelets 



opaque 9. 



4. Sessile spikelets §■ inch long ... ... 5. 



Sessile spikelets ^ inch long \Q. hh-tiflorus. 



o. Inflorescence enveloped in broad spathe- 



like sheath .. . 2. fragilis. 



Inflorescence not enveloped in broad 



spathe-like sheath ... .,, .,, 3, brevifolium, 



