THE EMBRYO 



20 1 



which is at a considerable distance from the micropylar end 



of the embryo-sac (Fig. 93). 



In Xelumbo Lyon '^ states that there is no suspensor, but 



that the divisions of the egg result in a large spherical body 



that is still undifferentiated when 

 consisting of several hundred cells, 

 recalling the Pistia type among 

 Monocotyledons. In Ceratophyl- 

 lurn demersum Strasburger 84 has 

 found the same undifferentiated 



- s 



— e 



Fig. 93. — Myoporum serratum. Young 

 embryo with very long suspensor 

 embedded in endosperm. — After 

 Billings. 70 



B 



Fig. 94. — Barringtonia Vriesei. A, young 

 proembryo; £, later stage, showing 

 differentiation into embryo (e) and 

 suspensor (s) ; x 1<»4. — After Tkeub. 27 



spherical embryo of hundreds of cells and with no suspen- 

 sor; while in Nymphaea Conard S1 finds the same type, but 

 associated with it is a suspensor consisting of a row of 

 throe to five cells. In Heckeria (Piperaceae) Johnson 86 has 

 described the early stage of the embryo as a globular mass 

 '•<>mposed of several hundred cells undifferentiated except for 

 a rudimentary suspensor: and in Cynomovium ( Balanophora- 

 ceae) Juel 93 describes the embryo as a small spherical mass 

 of cells with no suspensor and no differentiation into body 

 regions. 



In Barringtonia Vriesei, one of the. Myrtaceae, Treub 27 

 has described a broad mass of tissue almost filling the micropy- 

 lar end of the embryo-sac. At first the mass is homogeneous, 



