MIMICRY. 



the species are mostly South American. This is 

 represented by Hetcropterys laurifolia (fig. 74) ; and 

 yet again in the Phytolaccacccu, the same kind of 

 samara is found in at least two genera, of which 

 we have illustrated Gallesia goranema and Segiiiera 

 floribunda. These four illustrations are from three 

 natural orders, all separate from each other and from 

 t^e maples, and yet, not only is the size and form 

 the same, but also the veining in the wings. So 

 deceptive is the resemblance between these fruits, 

 that only dissection and analysis could determine 

 one from the other. 



Another type of 

 samara is that of the 

 elm, in which the seed 

 occupies the centre, 

 surrounded by a wing. 

 Our common forms 

 are those of the com- 

 mon elm (JJlmus cam- '^^ 

 pestris) and the wych ^ 

 el m ( U hulls inontana) , c 

 the latter being the 

 largest. This form of ^'S- 75--Samaraof («) Ulmus cam- 

 ..... , . pestris, {b) Ulmus inontana, (c) 



fruit IS imitated in ptdea trifoliata,{d) Hira:a. 

 Ptelea trifoliata, a 



tree of the Riitacecz, and in a species of Hircsa, one of 

 the Malpighiacece. 



