OLASS XXII. ORDER VI. ] POPULUS. 1285 
ORDER VI. 
OCTAN'DRIA. 8 STAMENS. 
GENUS IX. POP'ULUS.—Liny. Poplar. 
Nat. Ord. Sanici’‘NEm. RicwH. 
Gen. Coan. Flowers in cylindrical catkins, the scales jagged at the 
end, Barren flowers with eight to twenty stamens, arising from 
an obliquely truncated cup at the base of the scales. ertile 
flowers with the perianth turbinate. Stigmas four to eight. 
Capsules superior, imperfectly four celied by the rolling in of the 
edges of the valves. Seeds numerous, comose. adicle superior. 
—Named populus, by its being commonly planted in places of 
amusement by the Romans, and hence became the tree of the 
people. The most striking gate and imposing entrance into 
Rome is called the Piazza del Popolo, from the circumstance of 
some famous Poplar trees having grown there. 
1. P. alb'a, Linn. (Fig. 1547.) Great White Poplar, or Abela. 
Leaves roundish, heart-shaped, lobed, toothed, glabrous above, downy, 
and very white beneath, the terminal leaf five lobed ; fertile catkins 
ovate, with brown fringed scales; stigmas four. 
English Botany, t. 1618.—English Flora, vol. iv. p 243.—Hooker, 
British Flora, ed. 4. vol. i. p. 876.—Lindley, Synopsis, p. 238. 
Root widely extending, and putting up abundance of suckers- 
Trunk erect, from eighty to ninety feet high, with a smoothish bark, 
and horizontal spreading branches, white and cottony when young. 
Leaves roundish, heart-shaped at the base, angular, and from three to 
five lobed, variously and unequally tvothed with blunt teeth, dark 
green above, very white and cottony beneath, footstalks rather long 
and slender, with a pair of lanceolate stipules at the base, often 
wanting. Barren catkins about three inches long, cylindrical, pen- 
dulous, with brown toothed and fringed scales. Cup on a short stalk, 
obliquely cut at the mouth, the stamens usually eight, with short 
thick purple anthers. Fertile catkins at first ovate, becoming elon- 
gated, having rather smaller scales than the barren catkins. Germen 
ovate, green, smooth, embraced in the lower half by the perianth. 
Stigmas linear, spreading, paleish green, downy. 
Habitat. Moist and Mountain Woods. 
Tree; flowering in April. 
2. P. canes'cens, Smith. (Fig. 1548.) Grey Poplar. Leaves roundish 
ovate, angularly toothed, beneath as well as the branches greyish 
white, with downiness; fertile catkins cylindrical, with brown ciliated 
scales ; stigmas eight. 
