139. GBAMINEJE. 



Group 13. PoIIiniastrse. 



A. Glume i not dorsally grooved : — 



Sess. spkt. gl. ii awnless; iv very short, 2-lobed. 



Perennial 58. Eidalia. 



Sess. spkt. gl. ii awned. iv narrow-oblong 2-fid or 



2-toothed. Annual 59. PuUculum. 



B. Gl. i dorsally channelled, iv minute entire or 2-toothed 60. Pollinia. 

 Group 14. Ischaemastrx. 



A. Rootstock and base of stems clothed with woolly 



sheaths : — 

 Rhachis of spkts. flattened. Spkts. similar and homo- 

 gamous Gl. Pollinidiiim. 



B. Stem not woolly below. Joints and pedicels stout. 



Spkts. heterogamous: — 

 Spikes clustered. Gl. i not channelled . . . . G2. IschcBmmn. 

 Spikes solitary. Gl. i mesially channelled . . . (id. Sehima. 

 Group 15. Amphilophiastrse. 



Racemes in compound panicles 07. Capillipedium 



Racemes subdigitate or fascicled or subverticillate on an 



elongate central axis Q^. Amphllopliu, 



Group 16. Sorghastrae. 



A. Primary branches of panicle whorled, racemes of many 



pairs of spkts. Gl. i coriaceous, muricate (in our sp.) 69. 1'eticiera. 



B. Racemes of few pairs of spkts. (rarely 6), sometimes 



reduced to 1 sess. and 2 ped. Gl. i not coriaceous or 

 muricate, or okl sometimes coriaceous : — 

 Spkts. dorsally compressed. Ped. spkt. sometimes 



reduced to the pedicel. Sess. spkt. awned or not . 70. Sorghum. 

 Spkts. usually laterally compressed nearly always 

 reduced to 1 sess. and 2 ped. on the tips of the 



peduncles, awned 71. Chrysopogon. 



Group 17. Schizachyriastrae. 



Ped. spkt. much larger than the sess. Sess. gl. i linear; 



ii awned 75. Biectomis. 



Ped. spkt. subequal or smaller than sess. Sess. gl. i oblong- 

 coriaceous. Gl. ii awnless ~Q. Scliizaehyrium. 



Group 18. Themedastrae. 

 Central spike'.ets jointed on rhachis and deciduous leaving 

 the involucral spkts. on the peduncle . . . .79. Themeda 



{Anthistiria), 

 AVhole cluster jointed below the involucral spikelets and 

 falling together from the short peduncle . . . .SO. Iseilema. 

 Group 19. Rottboelliastrae. 



A. Sessile aiid pedicelled spkts. very dissimilar. Sessile 



globose 72. Maiiisuris. 



B. Sessile and pedicelled spkts. subsimilar and flattened 



or ped. spkt. obsolete : — 



1. Spike readily disarticulating; subterete:— 



a, Gl. i convex. Ped. spkt. completely suppressed 



and the pedicel fused with the internodes . 83. Ophiuriis. 



h. Gl. i flat. Ends of the joints cupular or deeply 

 hollowed out :— 

 Ped. spkt. distinct and its pedicel only partially 



adnate . 8i. Motthoellia. 



Pedicelled spkt. su])pressed, its fused pedicel 

 rarely bearing a rudimentary glume. Fertile 

 spkts. opposite and deeply sunk in cavities, 

 only separated by a thin evanescent mem- 

 brane 8-5. Mnesithea. 



2. Joints coherent, tips truncate. Spikes compressed SO. Hemarthria. 

 Group 20. Maydeae. Maize, Job's Tears, etc. 



A. M. and Fem. spikes not in separate inflorescences (or 

 rarely terminal inflorescence wholly male) ; — 

 Fem. spkts. often several at base of spikes, male spkts. 

 at top. Fem. gl. i hardening, only open by a ventral 

 slit ' 87. Folytoca. 



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