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SIE J. LUBBOCK: — PHTTOBIOLOGICAL OBSERTATIOXS. 



Inmost cases, therefore, the first leaves are simpler than those 

 which lullow. lu species from very dry localities, however, the 

 reverse is often the case. For instance, in Lasiopefalum ferru- 

 gineum (fig. 134), from Adelaide, the first few leaves are spatu- 

 late and more or less lobed, the final ones linear. Again, in 

 ^odoncea viscosa^ also from Adelaide, the first leaves are lobed, 

 the subsequent ones simple. 



Fig. 134. 



Seedling oi Lasiopetalum fermgineum. Half nat. size. 



Helation oftTie Seedling to tlie Seed. 



To return for one moment to the case of seedlings. The question 

 of course arises whether the embryo conforms to the seed, or 

 wliether the shape of tlie seed is determined with reference 

 to the form of the cotyledons. The seeds, however, evidently 

 depend on the habits, conditions, &c. of the parent plant. I 

 have elsewhere dealt with the structure of the seed, and must 

 content myself here with the simple statement that we have no 

 reason to suppose that it is influenced by the form of the embryo. 

 On the other hand, it seems equally clear that the form of the 

 embryo, and especially of the cotyledons, is essentially influenced 

 by that of the seed. 



The Tea (Thea)^ for instance, presents us witb a very interest- 

 ing case, in which the cotyledons vary greatly in shape, following 

 that of the seed, and depending on the number of ovules which 

 develop ; they are contained in a wooden capsule, and are 

 variously compressed. In CiVrMsalso the cotyledons are unequal 



