294 



2. 



1.— PYCREUS. 



Key to species. 



Leaf sheaths covering ^ of the stem ... 

 Leaf sheaths at bottom of the stem only 

 Grlume with recurved excurrent midrib 

 Glume blunt or shortly apiculate 

 Plant annual 

 Plant perennial... 



1. .saiufitinolentus. 



'•2. 



2. f/lubosus. 



3. 



3. pulvinatus. 



4. polystachyus. 



1. P. sanguinolentus, Nces ; Cypcrus Eragrostis, Vahl ; Benth. 



FI. Hongk. 385. On the edges of paddy fields, Hongkong ; 

 Castle Peak, Hongkong New Territory ; Macao ; Lofou- 

 shan. Fl. November. 



2. P. globosus, Reichb. ; Cyperus vulgaris, Kunth ; Benth. 1. c. 385. 



Aberdeen, Hongkong ; Canton ; Macao. Fl. August. 



3. P. pulvinatus, Nees ; P. nitens, Nees ; Hook. f. Fl. Brit. 



Ind. vi. 591. Aberdeen, Hongkong ; Taitamchong river, 

 Hongkong New Territory ; Lintin Island, Canton River, 

 near Hongkong ; Pakhoi ; North Kiver. Fl. July. 



4. P. polystachyus, Beauv. ; Cyperus polystachyus, Benth. 1. c. 385. 



Victoria Peak, East Point, and Pokfulam, Hongkong ; 

 Stonecutters' Island ; Taimoshan, Hongkong New Terri- 

 tory ; Whampoa ; Canton ; Macao ; Lofoushan. Fl. June 

 — September. 



1. J. serotinus, C. 

 Canton. Fl. . 



2.— JUNCELLUS. 

 B. Clarke in Hook. f. 



Fl. Brit. Ind. vi. 594. 



3.— CYPERUS. 



Key to species. 



1. Spikelets digitate or clustered 

 Spikelets spicately or subracemosely 



disposed 



2. Grlumes strongly mucronate ... 

 Glomes not mucronate or very shortly so 



3. Annual plant 



Tall perennial plant 



4. Plant tall 



Plant small 



5. Umbel longer than stem 

 Umbel shorter than stem 



6. Nut nearly equal to glume 

 Nut ^ the length of the glume 



8. Rachilla not or only narrowly winged 

 Rachilla distinctly and widely winged 



9. Annual with tufted stem 



Perennial with woody, sometimes very 

 short, rhizomes and often long 

 stolons 



1. 

 2. 



3. 

 4. 

 5. 

 6. 



3. 

 6. 



4. 



5. 

 compresstis. 

 Hticinatus. 

 radians, 

 diffnsus. 

 (Jiff'ornis. 

 Haspan. 



9. 

 15. 

 10. 



11. 



