54 il//-. Woods on tJte Gênent of Europecm Grasses. 



36. Ampelodesnms. Spicule^ many-flowered, the lowermost perfect, unless 

 when the inner glume is changed into an imperfect floret. Outer glume 

 rather the smallest. Palea with a sub-apiculate awn. Seed crested ! 

 Panicle diffuse. 



H. Spiculse scattered, 1 -flowered, without glumes. 



12. Leersid. Paleœ ribbed, herbaceo-membranous, of equal length, nearly 



valvular; the outer boat-shaped, unarmed. 

 28. Coleanthus. Palea> membrano-scariose. The outer twice as long as the 

 inner, setigerous. Stamens 2. 

 Lygeum. 



I. Spiculœ scattered, 1 -flowered, in a spike-like panicle or head. 



19. Achnodon. Spiculœ spindle-shaped. Glumes equal, boat-like, unarmed, 



including. Outer palea unarmed, embracing the inner, of equal length. 



20. Pli/eiini. Spiculce oblong. Glumes nearly equal, setigerous, parallel on 

 the keel, including 2 unarmed palese. 



21. Alopecurus. Glumes equal, unarmed, generally united at the base! 

 Palea 1, the margins in some species united below! Awn dorsal. 



22. Cn/jisis. Head or s])ike included in most species in a common involu- 

 crum. Glumes membranous, unarmed. Paleee membranous, unarmed, 

 as long as the glumes. 



C. aculeata has only 2 stamens. C. alopecmoides a naked spike. 



23. Gastridium. Glumes ventricose at the base! including. Paleee sca- 

 riose. 



44. Las;iirns. Glumes scariose, ending in a long fringed seta. Outer palea 

 (juite smooth, ending in two setoe, and an intermediate geniculate and 

 twisted dorsal awn. 



11. LapjHigo. Outer glume scariose ; inner coriaceous and prickly. 

 Polt/pogon monspeliense and mavitiminn. 



K. Spiculse 1 -flowered, scattered, in a loose panicle. 



13. Oryza. Ghmies small, separate from the floret and from each other. 

 ïStamens 6. 



