PHANEROGAMIA. 403 



terior octants abutting on the suspensor. In some cases, the trans- 

 verse division precedes the longitudinal. From the anterior octants 

 are developed, in Dicotyledons generally (Fig. 238), the two coty- 

 ledons and the growing-point of the primary stem, but the growing- 

 point of the primary root is supplied from the last cell of the 

 suspensor (Fig. 238 A, a) which divides transversely into two (Fig. 

 238 B) and contributes the cell h, the hypophysis, to complete the 



Fro. 239. TSmbryogeny of Monocotyledons, as represented by Alisma Plantago (diagram- 

 matic, after Goebel, Hanstein, and Famintzin). A-C Successive stages: a embryo-cell; 

 b lowest cell of suspensor, susp. : the products of the repeated transverse division of b are 

 indicated (c, d, e, f) in B and C. In C, a has given rise to the single terminal cotyledon : 

 cto the growing-point of the primary stem; d and e form the bypocotyl; the growing- 

 uoint of the root is developed from/; ep dermatogen. D is a mature embryo, less highly 

 magnified : cot. cotyledon ; st. growing-point of stem ; Jii,p. bypocotyl. The nuclei of 

 the cells are indicated in A and B. 



root-end of the embryo. In Monocotyledons, on the other- hand, 

 the embryo cell gives rise, as a rule (Fig. 239 A and (7, a), only 

 to the single terminal cotyledon; whilst the last cell of the 



