SEEDLINGS OF CYMBOPOGON. 



171 



factor. Out of 31 F2 plants, however, only 3 showed the 

 complete mucronate character in all three glumes, whilst 3 

 plants were non-mucronate in all three glumes. The remaining 

 plants showed various combinations of mucronate, non- 

 mucronate, and intermediate glumes. The possibility- 

 presents itself that the ratio found — 3 : 25 : 3 — may represent 

 an actual ratio of 1 : 14 : 1 , such as would indicate the presence 

 of two pairs of segregatmg characters. 



The result is complicated by the fact that Glumes III. and 

 IV. of the seedlings show a tendency to be less mucronate 

 than Glume II. 



Total 



15 



22 



Leaves rough or smooth '■ — 



Rough. 

 No. 4 . . 6 



No. 12 . . 7 



Half Rough. 



2 

 5 



Total 



13 



Smooth. 



4 

 6 



10 



20 



Lena-batu has rough leaves intermediate in droop. 

 The two last-named characters exhibit a notable example 

 of coupling : — 



12 plants had rough erect leaves. 

 5 plants had smooth droopmg leaves. 



2 plants were classified by Mr. Jowitt as interme- 



diate in both respects. 

 5 plants had leaves smooth and intermediate in droop, 



3 plants had erect leaves of mtermediate texture. 



1 plant had drooping leaves of intermediate texture. 



No plants were classified either with smooth erect leaves or 

 rough drooping leaves. 



Before the above point was noticed Mr. Jowitt had written : 

 " The valuations of the vegetative characters were difficult, 

 as the plants are crowded together ; this chiefly refers to erect 



