^ Proceedings of the Royal Irish Academy. 



5. Platanus pyramidalis, Eivei-s, in " Gardenei-s' Chronicle," 1856, p. 86. 



Plate VI, fig. 4. 



P. vnlgorix pyramidolis, Petzold anil Kirchner (1864). 



P. oricntalis pi/ramida/is, Bolle ^^1875). 



P. occidentidi.s pyramidalis. .Taeunicke (1890). 



A tree compact in habit when young, but with wide-spreading branches 

 when old, which, however, do not di-oop. Leaves modei-ate in size, about 

 6-7 inches wide, glalnous, with usually only three lobes, which are short, 

 broadly triangular, and slightly toothed ; base truncate, with a short cuneate 

 centre, the main nerves arising a short distance above the junction of the 

 blade with the i>etiole. Fruit-balls, one or two, very large, li-1} incli in 

 diameter, bristly: acliene with tomeutose elongated body and nearly glabrous 

 conical hea<i, terminating in a persistent style. 



This tree is now mucli used in street-planting, having been imported on 

 a large scale from the Continent during the last forty yeai-s. It is probably 

 a see<Ilin2, which ori'inated in France about 1850, as it was fir.'st mentioned 

 by Kivers as an introduction from that country in 185G. He described it as 

 " fasiigiate when young, becoming more diffuse as it increases in age, but not 

 spreading at all to the extent of P. acrri/olia." It is very satisfactory in 

 streets on account of its form ; but it is scaicely so vigorous a-s P. aeeri/olia. 

 It was state*! in 1875 to have been widely distributed in France on account 

 of its bright green colour and the ease with which it could lie propagated 

 from cuttings; and tiiese qualities have contributed to its popularity in 

 England. 



G. Platanus cuneata, Willd. 



I'laU; VII, tig. G. 



P. orieutalit ruiuata, Loudon (1838). 



P. lupidauis, Morren (1848). 



P. orirntaiii nepaUnsit, Wcsmael (1868). 



A tree, motlerate in vigour, with deeply five-lolled leaves, which are 

 conspicuously dental*, becoming practically glabrous when adult, diftering 

 mainly from P. uritnialii in the very cuneate base ; main nerves arising a 

 considerable distance alx)ve the junction of the petiole with the blade. Fruit- 

 balls small, rarely exceeding \ inch in diameter, 2. ;}, or 4 on the peduncle, 

 composed of relatively few achenes, often imperfect, with a tomentose body 

 and a glabrous conical head ending in a persistent style. 



Young trees of ordinary P. orvenialis, and certain wild forms when adult, 

 as liie «'yi>rus plane, l-ear cuneate leaves, tscai-cely, if at all, distinguishable 



