15. Make a drawing (2x) of a joint of the barley rachis with spikelets attached, as se.jn 

 from the outside, (a) First, of six-row, bearded, hulled, (b) Second, of six-row, hooded, 

 naked, (c) Third, of two-row, bearded, hulled. 



16. Make a drawing (2x) of the central spikelet of a two-row, covered, bearded bar- 

 ley. Remove the sterile spikelets before drawing. 



Fig. 58. 

 (a) A group of barley spike- 

 lets supported by a rachis joint 

 of two-row barley: (b and d) 

 sterile spikelets : (c) fertile 

 spikelet. (Anderson.) 



17. (a) Make a drawing (2x) of the suture side of a six-row, naked barley kernel, (b) 

 Make a drawing (2x) of the germ side, (c) Make a drawing (2x) of the cross section. Name 

 the drawings and indicate brush, suture, germ, etc. 



95 



