I 



EMBRYO, SEED AND CARPEL IN THE DATE. 115 



IT) 



showed the 



same distribution of starch. 

 Tronja. May 16. One day 



suits qualitatively but much less marked. 

 Deglet Noor. Pollinated, April 6; fixed, May 16. 

 arch in a few scattered grains in the pedicel in the paren- 

 vma adiacent to the bundles, in the parenchyma at the 



and in the inner integument between 



funicle and micro 



Nondescript. Pollinated, Apr. 11 ; fixed, May 28. Starch 



and 



integument 



Deglet Noor. Pollinated, April 6; fixed, May 16. 

 Starch restricted to the mass of tissue between the funicle 



■ 



and micropyle and to a small volume of tissue along the 

 funicle nearby. More in the base of the carpel itself. 

 Up to this time the growth of the ovule has involved 



m 



» 



has disappeared, and in which it never reappears. 



It is thus seen that this form of carbohydrates plays only 

 a brief role during the embryological period. The deposition 

 of starch appears to be inconsistent with a very rapid develop- 

 ment such as characterizes the date fruits after the seventh 

 week following pollination. 



The course of the disappearance of starch seems to be 

 connected, in part, with the general growth of the ovule, 



as with its removal 



The latter 

 remains 



com 



in the outer integument is probably consumed durin 

 earlier phases of growth in this structure. 



Embryo. Starch appears in the embryo at first at a 

 paratively last stage of development. At 17 weeks (f. 17) 

 a very small amount is seen in the root cap and in the apex 

 of the cotyledon. During the embryological history starch 

 is unimportant quantitatively; during germination as de- 

 scribed by Sachs (1862) its importance increases. 



I Ikeda, 1902. 



