CHAP. CII1. SALICA'CE. PO’PULUS. 1645 
containing nearly 120 ft. of timber. In Banffshire, at Gordon Castle, it is 70 ft. high, the diameter 
of the trunk 3ft. In Clackmannanshire, in the garden of the Dollar Institution, 12 years planted, 
it is 50ft, high. In Forfarshire, at Monboddo, 16 years planted, it is 25 ft. high; at Courtachy Castle, 
14 years planted, it is 27ft. high. In Perthshire, at Taymouth, it is 60 ft. high, the diameter of the 
ck 2 fs a of the head 25 ft. ; in Messrs, Dickson and Turnbull’s Nursery, 28 years planted, 
it is 54ft. high. 
Pépulus dlba in Ireland. In the environs of Dublin, in the Glasnevin Botanic Garden, 35 years 
Giented, it is 60ft. high. In King’s County, at Charteville Forest, 45 years planted, it is 120 ft. high ; 
iameter of the trunk 2 ft. 10in., and of the head 20 ft. In the County of Down, at Ballyleady, 10 
years planted, it is 35 ft. high, diameter of the trunk 1}ft., and of the head S3ft. In Galway, at 
Coole, 70 years planted, it is 80 ft. high, the diameter of the trunk 23 ft. 
Pépulus djba in Foreign Countries. In France, at Toulon, in the Botanic Garden, 30 years planted, it 
is 50 ft. high, the diameter of the trunk 2 ft. ; at Avranches, in the Botanic Garden, 40 years planted, it is 
60 ft. high, the diameter of the trunk 23 ft., and of the head 40 ft. In Hanover, at Gottingen, in the 
Botanic Garden, 40 years planted, it is from 70 ft. to 80 ft. high, the diameter of the trunk.from 2 ft. to 
8 ft.,and that of the head 50ft. In Saxony, at Worlitz, 60 years old, it is 50 ft. high, with a trunk 34 ft. 
indiameter. In Bavaria, in the Botanic Garden, Munich, 2+ years old, it is 30 ft. high, the diameter of 
the trunk 1 ft. ; in the English Garden, 30 years planted, it is 50 ft. high. In Austria, at Vienna, at 
Taxenbarg, 80 years old, it is 45 ft. high; at Kopenzel, 18 years planted, it is 20ft. high; in the 
garden of Baron Loudon, 30 years planted, it is 36 ft. high ; the diameter of the trunk 14in., and 
of the head 16ft. ; at Briick on the Leytha, 60 years old, it is 90ft. high, the diameter of the trunk 
14 ft., and of the head 60 ft. In Prussia, at Berlin, at Sans Souci, 50 years old, it is 60 ft. high, the 
diameter of the trunk 23ft., and of the head 28ft. In Italy, in Lombardy, at Monza, 30 years old, 
it is 70 ft. high, the diameter of the trunk 2 ft., and of the head 40 ft. 
Commercial Statistics. Price of plants, in the London nurseries, 25s. per 
hundred, or, when of large size, 1s. each ; at Bollwyller, 1 franc each. 
+ 3. P. rre’muta L. The trembling-/eaved Poplar, or Aspen. 
Identification. Lin. Sp. Pl., 1464. ; Du Roi Harbk., 2. p. 148.; Willd. Arb., 228. ; Sp. PL, 4. p. 803.5 
Spreng. Syst. Veg., 2. ‘Sie ; Dill. Dict., No. 2.; Pall. Fl. Ross., 1. p. 65. ; Smith Eng. Bot., t. 1909. ; 
Engl. FL, 4. p. 244. ; Hook. Fl. Scot., 289.; Mackay Fl. Hibern., pt. 1. p. 254.; Du Ham. Arb., ed. 
nov,, 2. p. 183.; Hoss Anleit., p. 153. 
Synonymes. P. No. 1633., Hall. Hist., 2. 303.; P. libyca Raii Syn. 456. ; P. h¥brida Dod. Pempt., 
836., Raitt Syn., 446.; P. nigra Trag. Hist., 1033., fig.; P. pendula Du Roz; le Tremble, Fr. ; la 
Tremola, Alberalla, Alberetto Ital. ; Zitter-Pappel, Espe, Ger. 
Derivation. The English name of Aspen is evidently derived from the German, espe. 
The Sexes. Both sexes are described in the English Flora. A male plant was flowering in the London 
Horticultural Society’s arboretum in the spring of 1835. The plant growing in the Cambridge 
Botanic Garden a few years ago, and perhaps still growing there, was a male one. 
Engravings. Eng. Bot., t. 1909. ; T. Nees ab Esenbeck Gen. Pl. F). Germ., fasc. 1., the catkins of the 
female, the flowers of both sexes, and the fruit; Blackw., t. 248.; Ger. Em., 1487. fig.; Lob. Ic., 
2. 194. fig.; Baub. Hist., 1. 163. fig.; Matth. Valgr., 1. 125. fig. ; Cam. Epit., 67. fig. ; Dod. Pempt., 
836. fig.; Dalech. Hist., 87; fig.; Treg. Hist., 1083. fig.; Hayne Abbild, t. 203.; our fig. 1509. ; and 
the plate in our last Volume. 
Spec. Char., §c. Young branchlets hairy. Leaves having compressed foot- 
stalks, and disks that are roundish-ovate, or nearly orbicular; toothed in a 
repand manner, downy when young, afterwards glabrous on both surfaces. 
Stigmas 4, erect, eared at the base. (Smith, Willd., Spreng.) It is a native 
of rather moist woods, as well as of various other situations throughout 
Europe. (Smith in Rees’s Cyclop.) It flowers in Britain in March and 
April. 
Varieties. In our opinion, P. trépida, P. grandidentata, and P. gra‘ca are 
nothing more than different states of P. trémula; nevertheless, we have fol- 
lowed the authorities, and given them as species, inserting below only what 
are considered as varieties of P.trémula. Among the specimens sent by 
Professor Mertens to Sir J. E. Smith, before mentioned (see p.1640.), the 
following approximate to P. trémula : — 
¥ P. t. 1 monticola, P. monticola Mertens. —The professor seems to think 
this the genuine P.trémula of Linnzus. The specimen is of a male 
plant. a 
P. t. 2 parvifolia Mertens. —There are specimens of both sexes of this 
variety. 
P. t. 3 grandifilia Mertens. — The specimen is of a female plant. 
P. t. 4 rotundifolia major Mertens. — The specimen is of a male plant. 
P. t. 5 minor Mertens. — This specimen is of a male plant. 
P. t. 6 oxyodénta, P. oxyodénta Mertens. — The professor appears to 
doubt whether this is only a variety of P.trémula. Smith de- 
scribes the teeth of the leaves of the species as nominally blunt : 
oxyodé6nta signifies sharp teeth; and in the specimen the teeth of 
the leaves are rather pointed. It is of a male plant. 
* P.t. 7 stricta, P. stricta Mertens, — The professor appears doubtful 
HHRHR H 
