116 HARRIS AND AVERY: MORPHOLOGICAL VARIATIONS 



around the modal classes 3, 6 and 9. The results in TABLE VIII 

 show essentially the same relationships as those given in TABLES 

 VI-VII. First, the higher leaflet numbers are more extensivel} 

 represented in the abnormal plants of each of the four types thar 

 they are in the controls. Second, the tricotyledonous plants shov 

 a far greater increase in the number of leaflets inserted at the thirc 

 node than do those abnormal only in the position at which th&amp;lt; 

 two cotyledons are inserted. 



TABLE VIII 



PERCENTAGE FREQUENCIES OF NUMBERS OF LEAFLETS IN SEEDLINGS OF VARIOUS 



TYPES 



In substantiation of these conclusions the reader will note th 

 in the class with slightly separated cotyledons 5.68 per cent, of t, 

 plants have from five to ten leaflets as compared with 4.34 \ 

 cent, with five and six leaflets in the control series. In seedlir&amp;gt; 

 with more widely separated cotyledons but no other abnormal 

 there are 7.63 per cent, of the plants with five to seven leaflets &amp;gt; 

 compared with 4.77 per cent, of the normal controls with five 

 six leaflets. Seedlings with three cotyledons but the normal numl r 

 of primordial leaves have 27.43 per cent, of the individuals wi 

 from five to nine leaflets as compared with 4.36 per cent, with f 3 

 or six leaflets in the normal controls. 



Plants with a trimerous cotyledonary and primordial whl 

 have 32.28 per cent, of the seedlings with from five to eleven leaf s 



