184 



POPULPJS. 



Populus tremula. Linn. 

 THE ASPEN, OR TREMBLING POPLAR, 



Pop. tremula Linn. sp. pi. 1464. 



Smith's Eng. Bot. p. 1909. Id. Eng. Flor. vol. iv. p. 244. 

 Hooker's Flor. Scot. p. 289. 

 Mackay's Flor. Hibern. part i. p. 254. 

 Johnston's Flor. of Ber. 1. p. 219. 

 Loudon's Arb. Brit. vol. i. ch. ciii. p. 1G45. 



The following- are the chief specific or distinguishing 

 characters of this tree according to Smith and Hooker. 

 Leaves nearly orbicular, broadly toothed, glabrous on 



