406 98. GBAMIHEJE. 



A. Inflorescence panicUd or racemose ; rachis without lateral 

 excavations. 



Tr. VII. OIRYZEM. Spikeleta laterally compressed, l-flowered. 

 Glumes 0. Stigmas feathery. Pales enclosing but free 

 from the nut. — Pales opening only slightly. 



14. Lbebsia. Pales 2, like parchment, compressed, keeled, 

 awnless ; lower much broader. 



Tr. VIII. STIPACEJE. Spikelets cylindric, 1-flowered, with- 

 out any rudiment. Gl. unequal membranous, enclosing 

 the flowers. Pales hardening, enclosing but free from the 

 nut. 



[15. Stipa. Spikelets stalked. Pales coriaceous ; outer 

 cylindrical, convolute, evidently jointed to the kneed twist- 

 ed feathery awn.] 



16. Milium. Spikelets stalked. Pales like parchment, awn- 

 less ; lower ventricose, convex. 



Tr. IX. AOROSTIDE^. Spikelets laterally compressed, 1- 

 flowered, or with a superior rudiment, or many-flowered. 

 Gl. and pales membranous. 



t Gl. falling short of the outer pale. Style long. Stigmas often 

 protruded near the middle of thejlower. 



17. Phbagmites. Pan. diffuse. Gl. unequal; lower much 

 smaller. Fl. 1 — 6, awnless, with silky hairs at their base ; 

 lower imperfect. Lower pale acuminate, much exceeding 

 the inner, awnless. 



ft Ol. exceeding the flowers. Style short or none. 



18. PsAMMA. Pan. spikelike. Gl. nearly equal; lower rather 

 the shorter. Fl. 1, with silky hairs at its base, or without 

 Br superior rudiment. Lower pale with a very short awn. 



19. GAiiAMAQBOSTis. Pan. diff'use. Gl. nearly equal ; lower 

 rather the longer. Fl. 1, with sillry hairs at its base, with 

 or without a superior rudiment. Lower pale awned. 



20. Apbea. Pan. loose. Gl. membranous, acute, unanned ; 

 lower the smaller. Fl. 1, with hairs at its base, and a pe- 

 dicel-like rudiment. Pales unequal, scarious ; lower with 

 a long subterminal awn. 



21. Agrostis. Pan. loose. Gl. membranous, acute, un- 

 armed ; upper smaller. Fl. 1, with hairs at its base ; no 



