p:xplanation of plates. 



I. Setaria glauca. 



II. Seiarin italica (type). 



III. Setaria italica, var. barbata. 



IV. Setaria italica, var. purpurea. 

 V Setaria italica, var. typhoidea. 



The letters and figures refer to identical parts in all : — 

 A. A spike with the uppermost leaf (not. size). 

 I'l. A cluster of spikelets (not. size), 

 C A single spikelet (enlarged). 



D 1=GI. I; ;J = GI. II;3 = G1. Ill and it.s;>a/e. i ^.ii]. IW smd its pale. 

 5 = Fertile flower {all enlarged). 



