304 



20.— DIPLAORUM. 



I. D. caricinum, R. Br. ; Scleria caricina, Benth. ; C. B. Clarke 

 1. c. 688. Hongkong without locality ; Kuntong, Honk- 

 kong New Territory. Fl. September. 



21.— OAREX. 

 Key to species. 



1. S pikelets in compound panicles 

 Spikelets in simple racemes 



2. Leaves 1-2 inches broad 

 Leaves |-f inch broad 



3. Spikelets 1^-2 inches long 

 Spikelets under 1 inch long ... 



4. Terminal spikelet female at top 

 Terminal spikelet male at top or wholly 



male 



5. Spiklets pedunculate ... 

 Spikelets sessile 



6. Upper spikelets with few fruits, ovate 

 Upper spikelets with many fruits, 



cyHndric 



7. One to three spikelets male, remainder 



female or androgynous 

 AU spikelets androgynous 



8. Male spikelets 2 or 3, female 3 or 4 ... 

 Male spikelet 1 



9. Female spikelets 3 or 4, none androgy- 



nous 

 Two or more spikelets androgynous . . . 



10. Glumes with excurrent midrib 

 Glumes without excurrent midrib 



11. Utricle glandular or pubescent 

 Utricle glabrous 



12. Utricle densely glandular 

 Utricle pubescent 



13. Female spikelets ovate 

 Female spikelets linear 



14. Female spikelets lax, drooping 

 Female spikelets dense, erect ... 



15. Utricle densely papillose 

 Utricle not papillose ... 



16. Spikelet ^ inch broad, compact 

 Spikelet broader and la Ker 



17. Glumes obtuse ... 

 Glumes acute ... 



18. Utricle glabrous 

 Utricle pubescent 



19. Stems elongated ; leaves narrow 

 Stem short ; leaves very broad 



20. Peduncles fascicled 

 Peduncles distant 



4. 



1. scaposa. 



3. 



2. haccans. 



3. cruciata. 



5. 



7. 

 6. 



4. gibba. 



5. hanensis. 



D. Spacluana. 



8. 

 21. 



7. pumila. 



9. 



10. 

 19. 

 11. 

 15. 

 12. 

 13. 

 16. 



8. chinensis. 



9. canina. 



14. 



10. fusiformis. 



11. Phoenicis. 



12. maculata 



17. 



13. phacota. 



14. pruinosa. 



15. ligata. 



18. 



16. nexa. 



17. manca. 



20. 



18. Harlandi. 



19. tristachya. 



20. tenebrosa. 



