54 THE FLORA OF THE NORTHERN TERRITORY. 



Spikelets pale or dark brown, clustered on the rays of an umbel. Nut 

 narrow, nearly or quite as long as the glume (Fulvi). 



Spikelets small and few- flowered, in little globular clusters in a compound 

 umbel. — 17. C. holoschcenus. 



Spikelets very flat, long and narrow linear, clustered in a compound umbel. 

 Glumes mostly obtuse. — 6. C. dactylotes. 



Spikelets very flat, linear, clustered in a simple umbel or compound cluster. 

 Glumes tipped with fine points. — 14. C. Gilesii. 



Spikelets rather thick, oblong or lanceolate. Glumes obtuse or scarcely 

 acute. Stems obtusely triquetrous. 



Spikelets 8 to 12- flowered. Glumes imbricate though rather loose. — 



13. C. fulvus. 

 Spikelets 10 to 30 -flowered. Glumes spreading scarcely imbricate. — 

 4. C. carinatus. 

 Spikelets usually numerous in loose spikes along the rays of a simple or 

 compound umbel (Ornati). 



Spikelets flat, pale brown or yellowish green, very irregularly 



spicate. Glumes very obtuse, loosely imbricate.^-18. C. Iria. 

 Spikelets flat, pale, densely spicate. Glumes loosely imbricate, the 

 keel produced into a short point. — 10. C. eleusinoides. 

 Section IV. — Spikelets flat or terete, the rachis bordered by scarious wings, 

 either persistent or at length more or less detached as small scales. Glumes 

 imbricate. Style 3-cleft. Nut equally triquetrous. 



Spikelets shortly spicate or clustered on the rays of a simple or compound 

 umbel. Nut not exceeding half the length of the glume. (Corymbosi). 

 Stems leafless or the sheath bearing a very short lamina. 



Glumes concave, not at all or scarcely keeled. Nut more or less 



dorsally flattened. — 21. C. malaccensis. 

 Glumes keeled. Nut equally triquetrous. 



Stems transversely septate. — 3. C. articulatus. 

 Stems continuous. — 9. C. diphyllus. 

 Stems leafy at the base. 



Spikelets rather flat, usually acute, shortly and rather 



loosely spicate or clustered. 22. — C. rotundus. 

 Spikelets very narrow, scarcely flattened, in dense 

 clusters. Stem obtusely triquetrous. Leaves very 

 narrow. — 26. C. subulatus. 

 Spikelets clustered or shortly spicate on the rays of a simple or compound 

 umbel. Nut usually nearly as long as the glume. (Lucidi). 



Spikelets small, 5 to 8- flowered, in little globular clusters. Stems 



obtusely triquetrous. — 24. C. sporobolus. 

 Spikelets linear, scarcely flattened, 10 to 20- flowered, in close 



clusters or heads. — 1. C. angustatus. 

 Spikelets flat, of a rich bro\s'n. 15. C. Gunnii. 

 Spikelets in lengthened spikes along the rays of a compound or rarely 

 simple umbel. 



Spikelets flat. Glumes loosely imbricate. Nut more than half the 



length of the ghime. — 10. C. eleusinoides. 

 Spikelets flat. Glumes closely imbricate. Nut less than half the 

 length of the glume. (Exaltati). — 11. C. exaltatus. 

 Section V. — Spikelets narrow, terete or nearly so, often fle.\uose sometimes 

 1- flowered, the rachis bordered by hyaline wings embracing the nuts. Flower- 

 ing glumes distant, narrow, closely oppressed to the rachis. Style 3-cleft. 

 Nuts triquetrous. — 23. C. scaber. 



