309 



Spikelet indented ; one hard outer glume 34. Ophiurus (p. 



321). 



30. Outer glume membranous, 1-nerved ... 56. Microchloa (p. 



326). 

 Outer glume tubercled, 7- 10 nerved... 32. Arthraxon (p. 



321). 



31. Both spikelets 1-flowered 33. Kottboellia (p. 



321). 

 Sessile spikelet with a second flower 

 which is male ; pedicellate one 

 reduced to a glume ... ... 32. 



32. Outer glume globose ... ... ... 35. Manisuris (p. 



321). 

 Outer glume flat with incurved margins 37. Ischaemmn (p. 



322). 



33. Female flower in a hard white vesicle... 13. Coia; (p. 317). 

 Female flower not in a white vesicle ... 34. 



34. Female flowers crowded on a spongy 



spike 14. 2fea(p. 317). 



Female flowers not crowded on a spongy 



spike ... ... ... ... 35. 



35. Spikelets in a simple spike, upper ones 



male, lower fertile 11b. J%Man«(p.317). 



Spikelets dioecious, male ones in 

 clustered spike, female solitary 

 among clustered bracts \2, Spinifex {t^. Zll). 



36. Spikelets singly sessile or accompanied 



by a rudimentary pedicel .. . ... 37. 



Spikelets in pairs, one sessile, the other 



pedicelled 39. 



37. Glumes acute ... ... ... ... 38. 



Outer glumes broad and truncate ... 30. Apocopis (p. 320). 



38. Spikes many ; leaves deeply cordate ... 32. Arthraxon (p. 



321). 

 Spikes 1, 2 or many ; leaves not cordate 31. Dimeria. (p. 320), 



39. Both spikelets awned ... ... ... 40. 



One spikelet awnless ... ... ... 42. 



40. Glume iv more than i glume ii or 



spike solitary 41. 



Glume IV minute ; spikes subdigitate 28. PolUnia (p, 319). 



41. Inflorescence digitate 37. Ischaemum (p. 



322). 



Inflorescence racemose 29. Poffonathencm (p. 



320). 



42. Sessile spikelet hermaphrodite ... 43. 



All spikelets monoecious ZS. Heteropogon (p. 



322), 



43. Bisexual flower alone in the sessile 



spikelet 44. 



One bisexual and one male flower 



in sessile spikelet Zl. Ischaemum (p. 



322). 



