156 BULLETIN JARD. BOT. BUITENZORG, SÉRIE 111, VOL. V. LiVR. 2. 



delivered to the ceils of the parenchyma appearing there as starch. The 

 epithelium also takes nitrogenous and proteiii substances from the eiidosperm. 



In Phoenix dactylifera the following features may be noted: 



Before germination no starch nor tannin is found in the embryo; 

 proteins and fats are présent. 



The endosperm is composed of the well known thickened ceils whose 

 priniary membrames can be seen as continuous double lainellae between 

 the secondary wall thickenings; no inter-cellular spaces are présent in the 

 endosperm tissue. 



The contents of the endosperm ceils are proteins and droplets of oil- 

 like substances; starch and tannin are not présent in the ceils. 



The amount of oil in the endosperm is too small to account for the 

 large amount of dextrose and starch in the parenchyma of the embryo at 

 the beginning of germination and so the source of thèse is in the cell 

 wall thickenings of the endosperm. 



Bundies of the haustorium are the paths of transportation of proteins 

 taken up by the haustorium to be delivered to the young plant. 



With the beginning of germination oil disappears from the embryo 

 proper and sugar is found présent. 



From the beginning of germination until the end of the process sugar 

 is présent in "ail parts of the haustorium except in the epithelium (fermentation 

 layer), the layer beneath, *the cells of whicli are continually dividing, and 

 in the bundies. 



• The sheath of the cotylédon transports sugar to the embryo. 



Sugar is stored as starch in definite parts of embryo and haustorium 

 (Figure 3 Taf. IX, Sachs). After germination has begun tannin, is found 

 everywhere but in the endosperm. 



The second layer through division and also the third layer in part, 

 are resposible for the growth of the haustorium during germination. 



In the very beginning stretching is due to cells already formed in the 

 embryo before germination. 



The bundies of the haustorium are a continuation of those in the 

 cotyledonary sheath ; they are peripherally arranged. 



The outer cell layer of the haustorium is a continuation of the epidermis 

 of the cotyledonary sheath; the cells continue to divide ail through the 

 growth of the organ during germination. 



It is this epithelium which is responsible for the absorption of the 

 reserve material of the endosperm. 



No sugar or starch is found in those cells. 



With the growth of the haustorium the endosperm tissue in the vicinity 

 is softened forming a zone. 



A zone of crushed cells is présent around the haustorium, composed 

 of cells emptied of their contents whose primary walls only are seen. 

 Thèse primary walls can be followed into the yet intact part of the 



