220 DICECI A OCT ANDRIA . 



yellowish edge more or less fringed with soft hairs, sus- 

 pended on flattened stalks, so that 



" when zephyrs wake, 



The Aspen's trembling leaves must shake;" 



and by their friction on one another they make a constant 

 rustling noise, hence uncourteously feigned by some, be- 

 sides poets, to be " the matter whereof women's tongues 

 were made, which seldom cease wagging." 



3. P. nigra, leaves deltoid, pointed, serrated, smooth on both 

 sides ; catkins all lax and cylindrical ; stigmas 4, simple, spread- 

 ing. Black Poplar. 



Hal. In plantations. March. \\ 



282. RHODIOLA. 



1 . R. rosea, root thick, fleshy ; stem simple, a spawn high ; 

 leaves numerous, glaucous, fleshy, obovate, bluntly toothed ; 

 flowers yellow with orange-coloured nectaries, in a terminal 

 cyme. Hose-root. 



Hob. Coast of Berwickshire. I first observed this plant 

 growing on Fastcastle in the spring of 1827, and in the 

 autumn of the same year on rocks between Lamberton 

 and Burnmouth, with the Ilev. A. Baird, who, in the 

 following summer, found it in great profusion and 

 luxuriance at the foot of a deep glen about a mile south 

 of Fastcastle. The locality is interesting and unex- 

 pected, as the plant, in general, affects alpine rocks. 

 May, June. 7/ 



When recently dried, the root has an agreeable scent, re- 

 sembling rose-water. The plant has the habit of a 

 and is not uncommon in gardens. 



