64 ON SEEDLINGS 



and tapering much at the base, glabrous, with puberulous- 

 pubescent petioles, connate at the base. 



The first leaves are alternate, lanceolate, obtuse, tapering 

 to the petiole, obsoletely and distantly toothed at the margins, 

 and, like the cotyledons, are glabrous with pubescent petioles. 



Similar instances have been observed in many species of 

 Clarkia and (Enothera, and will be fully described in the 

 chapter on Onagrarieae. 



PIG. 110. (Enothera stricia, thirty days after germination. Nat. size. 



Here, therefore, we have an interesting group in which at 

 first the cotyledons are very similar, but by subsequent growth 

 at the base develop into several distinct types, in each case 

 closely resembling the leaf characteristic of the species. We 

 can therefore have little, if any, doubt that this growth is 

 influenced by the form of the leaf. 



The species in which a connection may perhaps be traced 

 between the characteristics of the leaves and those of the 



