46 



GRASSES 07 IOWA, 



Fip. 37. Tjllinatlon of Maize. .4, young ear with stitrmas- /{ tr, ti.o yitrht ^i«tii 



only when all trace of the axis is absent does the palea become 

 from one to many nerved (Avith a mid-rib) or nerveless. It is 

 almost always of a more delicate texture than the flowering 

 glume, its edges are usually turned in, and it has a furrow 

 instead of a mid-rib. The prophyllum of the culm branches 



