28 Proceedings of the lioyal Irish Academy. 



Plate IX. 

 Fig. 



9. Platanus : acheues (x 5), with basal tuft of hairs removed, except on the 



right hand, to show the tomentiuu. 



Parent species: — 1. P. occidcnfalis ; 2, P. onentalis. 



First generation hybrid: — 3, P. axerifolia. 



Second generation hybrids : — 4, P. hispanica ; 5, P. cuneata 

 6, P. jxirviloha ; 7, P. pyraniidalis ; 8, P. cantabi-u/ensis ; 9, P 

 dujilatu. 



10. Platanus occidentalis; vein-islets of the leaf (x 10). 



n. Seedling, 1 year old. 



b. .Seedling, 2 years old. 



f. Tree, .30 feet high. 



d. Tree, 50 feet high. 



