ON BUDS 



11 



buds, those of cotyledons are even more often influ- 

 enced by the shape of the seeds. Let me give two 

 instances in illustration. 



I will take first the Common Radish (Raphanus 

 sat ivus), with which, as regards the cotyledons, the Cab- 

 bage and Mustard closely agree. The seed of the Radish 

 is shaped as in fig. 12. What regulates the shape 



o 



FlOB. 12-14. Uadisii (Tictjihanus sativiis). 



18, outline of seed, x 4 : nmnicropyle; A,hilam ; 13, embryo in vertical section, x4. 

 showing the folded cotyledons and root (r) lying between them; 1 i 

 Dating seedling, showing the cotyledons still folded, x 2. 



of the seed is another question, into which I will not 

 now enter. The young plant, consisting of two leaves, 

 a small root, and a minute bud, occupies the whole 

 interior of the seed. Each leaf is folded on itself like 



