1650 ARBORETUM AND FRUTICETUM. PART III 
shoots and leaves had been protruded from this 
plant, and been blackened by frost; while in P 
trémula and P. canadénsis the leaf buds were most 
of them unchanged from their appearance in winter. 
Michaux states that, in America, the American 
aspen blossoms about the 20th of April, and that 
the leaves appear in ten days or a fortnight after- 
wards. He describes the leaves as small when 
compared with those of other poplars, and as being 
thrown into agitation by the gentlest breath of air. 
The catkins are composed of silky plumes, which are. 
pendulous, and protruded from the extremity of the 
shoots. The bracteas of the male flowers are of a 
dark chestnut colour, but are fringed with white 
hairs. The perianth is white. The anthers are 
numerous, and deep browr ; the pollen is white 
The bark is smooth. The wood, according to Bige- 
low, is light, fine, soft, and perishable; and the 
bark is used as a febrifuge. In the United States, it is scarcely applied to 
any useful purpose; though Michaux was informed that it had been 
successfully divided into very thin lamin, for the fabrication of women’s 
hats; and that these hats were, for a short time, fashionable in several 
towns of the United States. Among the Cree Indians, the wood is esteemed 
to burn better, in a green state, than that of any other tree in the country. 
(Frenklin’s first Journ., p. 753.) In Britain, this tree is in several col- 
lections, but is not very common: we believe it to be only a variety of 
the European P. trémula. Plants, in the London nurseries, are 2s. 6d. 
each; and at New York, 20 cents. : 
¥ 5. P.(v.) Granpipenta‘ta Michx. The large-toothed-deaved Poplar, 
or North American large Aspen. 
Identification. Michx. Fl. Bor. Amer., 2. p. 243. ; Michx. North Amer. Sylva, 2. p. 243. t. 99. f. 2.5 
Pursh Fl. Amer. Sept., 2. p. 619. ; Spreng. Syst., 2. p. 244. 
Engravings. Michx. North Amer. Sylva, 2. t. 99. f. 2.; and our fig. 1511. 
The Sexes. The female is represented in Michaux’s figure. The plants in the Horticultural Society’s 
Garden have not yet flowered. 
Spec. Char., §c. Leaf, when young, villous, afterwards glabrous on both 
surfaces ; the petiole compressed in the terminal part; the disk roundish- 
ovate, acute, sinuately toothed with large unequal teeth. (Pursh and 
Michx. sen.) Wild in Canada, and a 
tree, 40 ft. or 50 ft. high, with a trunk 
10in. or 12in. in diameter. The full- 
formed disk of the leaf is nearly round, 
and 2 in. or 3in. in width. ( Miche. jun.) 
P. grandidentata is occasionally met with 
in the American woods, but is much less 
common than P. trépida. It is easily 
distinguished from the various cultivated 
kinds of poplar, by the large unequal 
indentations of the margins of the leaves. 
The leaves, as Michaux observes, are 
covered, when young, with a white down, 
which disappears as they grow older. In 
many instances, the disk is furnished 4° 
with a pair of glands at the base. The $= 
catkins appear in May, and are 2in. or © 
3in. long. The wood is much like that 
_ of P. trépida. (Bigelow’s Account of “ The 
Plants of Boston and its Vicinity in 1824,” 
p. 369, 370.) There are plants of this 
