Mr. Woods 071 the Genera of European Grasses. 41 



inclosing the spicula, scariose at the margin. Outer palea of the form 

 and construction of the glumes. Florets distant. 



3. Melica. Ghimes nearly equal, membranous, with a scariose margin, as 

 long as the ovate compressed spicula. Florets I or 2, with the additional 

 stalked, club-like rudiment of one or two more. Paleae many-ribbed, 

 hardening on the loose seed. 



4. Mollnia. Glumes much shorter than the lanceolate spiculee. Florets 2 

 or 3, with the subulate rudiment of 1 more. Palese hardening on the 

 loose seed. 



5. Catabrosa. Glumes rounded, or truncate and erose, shorter than the 



spicula. Florets 1 or 2, the upper on a long stalk, without any additional 

 rudiment. Outer palea membranous, with 3 ribs ending in as many teeth, 

 which are united by the scariose margin. 



6. Sesleria. Spiculae sessile, tiled all round. Glumes membrano-scariose, 

 very acute, nearly or quite as long as the spicula. Outer palea keeled, 

 membranous, with a scariose margin ending in 3 or 5 points. Spike 

 compact, with bractese or abortive glumes at the base. Styles long, 

 united below. Stigmas very long. Squamulae laciniate. 



7. Oreochloa. Spiculse compressed in two rows, forming a 1 -sided spike or 

 head. Outer palea concave, entire, mucronulate. Styles long, united. 



8. Poa. Glumes nearly equal, shorter than the spicula. Outer palea mem- 



branous below, scariose at the tip, the parts usually separated by a 

 purple stain, nerved, subacute, compressed, keeled, unarmed. Panicle 

 scattered, equal. 



9. Eragrostis. Glumes and outer palea similar, membrano-scariose, equal 



throughout, with 3 prominent converging nerves. Spiculie oblong or 

 linear, 6 — 20-flowered, unarmed. Panicle scattered, equal. 



10. Glyceria. Glumes unequal, acute, membrano-scariose. Florets nume- 

 rous, cylindrical. Outer palea obtuse, or somewhat truncate, with 5 or 7 

 prominent nerves ending in long teeth, which are united by the scariose 

 margin, unarmed. 



11. Sclerochloa. Glumes unequal, acute, membranous. Outer palea cylin- 



drical at the base, with rounded, obscurely marked ribs upwards, often 

 keeled towards the top, truncate or obtuse, unarmed. 



VOL. XVIII. G 



