DIOECIA— OCTANDRIA. Populus. 297 



horizontal. jL*. nearly triangular, alternate, more or less deeply 

 cut into rather acute lobes ; above dark green, smooth. Stip. 

 on young branches, linear-spear-shaped, toothed. Scales of the 

 catk. hand -shaped, hairy, jagged. Ardh. violet. Leafstalks 

 flat, grooved on each side. Fl. like those of Pop. tremula. Ls. 

 roundish in the yovmg trees. Ls. without glands at the base 

 and serratures. Linn. 



Eaten by horses, sheep, and goats. Of very quick growth, at 

 maturity in some places in twenty years. For avenues in moist 

 grounds. Wood not easily liable to take fire, nor to blaze. The 

 wood is white, soft, tough, and of a close grain, serving for wain- 

 scotting, floors, laths, packing boxes, &c. 



P. canescens. Grey P. Leaves roundish, deeply waved, 

 toothed ; hoary and downy beneath. Fertile catkins 

 cylindrical. Stigmas eight. E. B. I6l9. P. alba, 

 foliis minoribus. G. E. 1487. 



TVet, turfy meadows. Sm. 



Tree. March. 



Branches more upright and compact than in Pop. alba. Trunk 

 grey, silvery, wood much firmer. Ls. rounder, much less white, 

 less deeply or acutely lobed, than those of Pop. alba. Pistil- 

 bearing catk. longer, scales more cut and hairy. Stig. spread' 

 ing in two opposite directions. 



P. tremula. Aspen^ or Trembling P. Leaves nearly 

 round, toothed ; smooth on both sides. Foot-stalks 

 compressed. Young branches hairy. Stigmas four, 

 erect, with an ear-appendage at the base. E. B. 1909. 

 P. Lybica. G. E. 1487. 



Moist woods. 

 Tree. March. 



Ls. with a little point, bluntly toothed, entire at the base, quiver- 

 ing with almost every breath of air, by their long, vertically 

 flattened foot-stalks. Sti}). bristle- shaped, visible on the most 

 luxuriant shoots only. Catk. scales of the pistil-bearing flowers 

 hand-shaped, jagged. C^ermew short, thick. Stig. crimson . At 

 the base of the young leaves, two united glands. 

 Leaves beset sometimes with red globules, the nest of a Tipula, 

 (an insect.) Bark smooth, green, used for torches : favourite food 

 of beavers. Fl. Suec. Drives away crickets. FL Suec. Grows 

 in all situations, and in all soils. Wood light, woolly, soft, durable 

 in the air. The Highlanders, according to Lightfoot, suppose our 

 Saviour's cross made of this tree, and that hence its leaves never 

 rest. 



P. nigra. Black P. Leaves deltoid, pointed, saw- 

 toothed, smooth on both sides. Catkins all lax and 



