l] SHEATH 5 



leaf-stalks\ but pass below into a sheath, which runs some 

 way down the stem and is nearly always perceptibly split 



Fig. 1. A plant of Oat (Avena), an example of a 

 typical grass, showing tufted habit and loose 

 paniculate inflorescence (reduced). Figuier. 



' Leaf-stalks occur in tropical Bamboos. 



