il//'. Woods on tJie Geiivra of European Grasses. 41 



inclosing the spicula, scarlose at the margin. Outer paîea of the form 

 and construction of the glumes. Florets distant. 

 .'3. Ulelica. Glumes nearly equal, membranous, with a scariose margin, as 

 long as the ov^ate compressed spicula. Florets 1 or 2, with the additional 

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

 hardening on the loose seed. 



4. MuUnia. Glumes much shorter than the lanceolate spiculœ. Florets 2 

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

 loose seed. 



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

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

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

 wliich are united by the scariose margin. 



6. Seslerla. 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 bracteee or abortive glumes at the base. Styles long, 

 united below. Stigmas very long. Squamulœ laciniate. 



7. Oreochlna. Spiculee compressed in two rows, forming a I -sided spike or 

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



S. 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. Spiculœ 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. Selerocldoa. 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 



