384 97. GRAMINEJE. ' 



Glumes 0. Stigmas plumose. Pales inclosing but free 

 from the nut. 



14. LEERSIA. Pales 2, chartaceous, compressed, keeled, 

 awnless ; lower much broader. 



[Tr. VIII. STIPACE^E. Spikelets not compressed, 1-flowered, 

 without any rudiment. Gl. unequal, membranous, inclosing 

 the flowers. Pales hardening, inclosing but free from the 

 nut.] 



[15. STIPA. Spikelets stalked. Pales coriaceous ; outer cy- 

 lindrical, convolute, evidently jointed to the kneed twisted 

 feathery awn.] 



16. MILIUM. Spikelets stalked. Pales chartaceous, awnless ; 

 lower ventricose, convex. 



Tr. IX. AGROSTIDE^E. 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 at the middle of the flower. 



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

 smaller. Fl. 2 6, awnless, with silky hairs at their base ; 

 lower imperfect. Lower pale acuminate, much exceeding 

 the inner, awnless. 



ft Gl. 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, 

 with a superior rudiment. Lower pale with a very short 

 awn. 



19. CALAMAGROSTIS. Pan. diffuse. Gl. nearly equal ; lower 

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

 or without a superior rudiment. Lower pale awned. 



20. APERA. Pan. loose. Gl. membranous, acute, unarmed ; 

 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 

 rudiment. Pales unequal, scarious ; dorsal awn falling short 

 of the glumes, or 0. A. canina wants the inner pale. 



