40 



A MANUAL OF FARM GRASSES 



I 



2. Seeds of some common grasses as they appear in commercial 

 samples, a, timothy enclosed in chaff, b, timothy free from chaff. 

 c, bluegrass, a single floret from a several-flowered spikelet, the seed 

 being enclosed in the chaff (lemma and palea) the joint of tha 

 rachilla showing on the concave side, d, redtop, a seed enclosed in 

 its chaff (lemma and palea). e, redtop, the naked seed. /, redtop, 

 the outer chaff or glumes. Well-cleaned seed should consist mostly 

 of seed like d and e and should be nearly free from the coarse chaff 

 like/, g, orchard grass, h, meadow fescue, i, English or perennial 

 rye grass, j, brome grass. In figurers g to j the spikelet has been 

 broken up in threshing so that there is presented a single floret with a 

 joint of the rachilla. 



