192 ENGLISH BOTANY. 



SPECIES I.— POPUL US ALBA. Lluu. 

 Plates MCCXCIX. MCCC. 



Young barren branches densely felted, hoary. Buds all downy, not 

 viscous ; flower-buds ovoid ; leaf-buds ovoid-conical. Leaves roundish- 

 deltoid or rhombic-orbicular, angulated or lobed, cottony white or 

 greyish- white beneath, at least when young ; those of the suckers ovate 

 or roundish-deltoid, coarsely toothed or lobed, cordate at the base, 

 permanently white or grey and cottony beneath. Male catkins cylin- 

 drical ; female catkins oblong while in flower. Catkin-scales cihated, 

 those of the male catkins laciniate, of the female crenate or more or 

 less deeply toothed or sublaciniate. 



Sub-Species I.— Populus eu-alba. 



Plate MCCXCIX. 



Eeich. Ic. Fl. Germ, et Helv. Vol. XI. Tab. DCXIV. Fig. 1270. 



P. alba, A^lct. Phtr. 



P. alba, var. a, Bromf. in Fl. Vect., p. 460. 



Young branches and buds densely cottonj:' and white. Leaves of 

 the suckers or young plants deltoid-ovate, with large lobes, at first 

 flocculent-pubescent above, afterwards glabrous, always densely cot- 

 tony and pure white beneath ; leaves of the flowering shoots roundish 

 deltoid, angulated and sinuate-dentate, permanently pure white be- 

 neath. Scales of the female catkins "crenate at the apex" (Koch). 

 " Stigmas bipartite, yellow " {Am.). 



In most woods and meadows, and beside rivers. Rather scarce, 

 but generally distributed in England, though doubtfully native. Ac- 

 cordmg to Dr. Graham, it does not flower about Edinburgh, so that 

 there is no probability of its being native in Scotland. Li L'eland it 

 occurs only where planted. 



England, [Scotland, L^eland.] Tree. Spring. 



A large tree sending up numerous suckers. Bark rather smooth, 

 grey. Branches spreading. Leaves on the young shoots 2 to 4 inches 

 long, with triangular lobes, those on the flowering shoots and spurs 

 smaller and rounder, less white beneath, and said to be sometimes 

 glabrous beneath when old. Male catkins pendulous, 3 inclies long, 

 with brown scarious laciniate scales, ciliated with long white hairs. 

 The fertile catkins I have not seen. 



