478 98. GRAMINE.E. 



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 cy- 

 lindrical, convolute, evidently jointed to the kneed twisted 

 feathery awn.] 



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

 less ; lower ventricose, convex. 



Tr. IX. AGROST1DE&. Spikelets laterally compressed, 1- 

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

 Gl. and pales membranous. 



f Gl. falling short of the outer pale. Style long. Stigmas of ten 

 protruded near the middle of the flower. 



17. PHRAGMITES. 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. 



tt GL exceeding the flowers. Style short or none. 



18. AMMOPHILA. Pan. spikelike. Gl. nearly equal ; lower 

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

 without 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. 



[22. LAGURUS. Pan. spikelike. GL scarious, ending in a 

 long fringed bristle. Fl. 1, with a pedicel-like rudiment. 

 Lower pale ending in 2 long bristles and with a dorsal 

 kneed twisted awn.] 



