1652 ARBORETUM AND FRUTICETUM. PART III 
ing more from P. trémula than either of the last three sorts described, 
still we are very much inclined to think that it is a variety of that species ; 
though we do not feel sufficiently sure to venture to indicate this even in 
parentheses. The trees in the Horticultural Society’s Garden were, in 1834, 
from 25 ft. to 30ft. high, after being ten years planted. The P. gre‘ca 
is very subject to the attacks of the poplar hawk moth (Smerfnthus pdpuli), 
the puss moth (Cerira vinula), and sometimes to that of other less common 
Phale‘nide. (See Mag. Nat. Hist., vol. v. p.48.) Price of plants, in the 
London nurseries, 1s. each; and at Bollwyller, 1 franc. 
Statistics. In England, in Surrey, at Bagshot Park, 16 years planted, it is 35 ft. high ; in Durham, 
at Southend, 12 years planted, it is 35 ft. high ; in Monmouthshire, at Woodfield, 10 years planted, 
it is 35 ft. high ; in Rutlandshire, at Belvoir Castle, 18 years planted. it is 30 ft. high, the diameter of 
the trunk 8 in., and of the head 24 ft.; in Suffolk, in the Bury Botanic Garden, 12 years planted, 
jt is 50 ft. high, the diameter of the trunk 9 in., and of the head 16 ft.; in Worcestershire, at Croome, 
40 years planted, it is 60 ft. high. In Scotland, in Perthshire, in Messrs. Dickson and Turnbull’s 
Nursery, Perth, 15 years planted, it is 20 ft. high. In Ireland, near Dublin, in the Glasnevin Botanic 
Garden, 20 years planted, it is 30 ft. high. Jn Saxony, at Worlitz, 30 vears old, it is 30 ft. high, the 
diameter of the trunk 1ft. In Prussia, at Berlin, in the Botanic Garden,10 years planted, it 
is 20 ft. high, the diameter of the trunk 6in., and of the head 4 ft. 
¥ 7. P. ni‘era L. The black-barked, or common black, Poplar. 
Identification. Lin. Sp. Pl., 1464; Pall. Fl. Ross., 1. p. 66. ; Willd. Arb., 229.; Sp. Pl., 4 p. 804.5 
Spreng. Syst. Veg., 2. p. 244.; Ait. Hort. Kew., ed. 2.,5. p. 396.; Du Roi Harbk., 2. p. 139.; Raii 
Syn,, 446.; Mill. Dict., No. 3.; Smith Eng. Bot., t.1910.; Eng. Fl., 4. p. 245.: Hook. Fl. Scot., 
989.; Mackay F 1. Hibern., pt. 1. p. 251. ; 
Synonymes. P., No. 1632., Hall. Hist., 2. p. 302.; P. alba Trag. Hist., 1080. fig.; P. vimfnea Du 
Ham. Arb.; Aigeiros, Greek ; Kabaki, Modern Greek ; the old English Poplar, Suffolk ; the Willow 
Poplar, Cambridgeshire ; Water Poplar; the female of P. nigra is called the Cotton Tree at 
Bury St.;Edmunds; Peuplier noir, Peuplier liard, Osier blanc, 7. ; schwarze Pappel, Ger. 
The Sexes. Both are described in the Eng. Flora. Numerous male plants of P. nigra grow on the 
east confines of Bury St. Edmunds, beside the river Lark, of which that figured in Strutt’s Sylva 
(our fig. 1514.) is one. In the male, Smith states that the stamens are “‘ eight, rarely more with 
us, though Linnzus and Leers describe 16.” A female plant of P. nigra stood, in 1829, on Hardwicke 
Heath, near Bury St. Edmunds, beside the pond; and itis said another female plant grows upon 
the same estate. 
Engravings. _ Eng. Bot., t.1910.; Ger. Em., 1486., fig. ; and others, quoted in Eng. Flora; T. Nees 
ab Esenbeck Gen. Pl. Fl. Germ. ; our fig. 1513,; and the plate of this species in our last Volume. , 
Spec. Char., §&c. _Petiole somewhat compressed. Disk of leaf deltoid, pointed, 
serrated with glanded teeth, glabrous on both surfaces. Catkins lax, 
cylindrical. Stigmas 4, simple, spreading. (Smith and Sprengel.) A tree, 
from 50ft. to 80 ft. high; a native of Europe, from Sweden to Italy, on 
the banks of rivers, and in moist woods; and found, also, in the north 
of Africa; flowering in Britain in March and April. 
Varieties. 
¥ P. n. 2 viridis Lindl.; P. viridis, Lodd. Cat., ed. 1836; has the leaves 
of a brighter green than the species. It was brought into notice 
by a nurseryman of the name of Nurse, of Bealings, near Woodbridge, 
in Suffolk, about 1816, or before. _ There is a plant in the London 
Horticultural Society’s Garden, and one in the Botanic Garden of 
Bury St. Edmunds, and it is propagated in several nurseries. 
* P.n. 3 salicifolia; P. salicifolia Lodd. Cat., ed. 1836 ; has long narrow 
* leaves, not unlike those of Salix yiminalis. Introduced from the 
Floetbeck Nursery in 1834. 
Description. A tree of the largest size, with an ample head, composed of nu- 
merous branches and terminal shoots. The bark is ash-coloured, and becomes 
rough and deeply furrowed with age. The roots, though they run along the 
surface, go deeper into the soil than those of either P. alba or P. trémula, 
and do not produce suckers, though the contrary is affirmed by Miller. The 
branches are whitish.; and the branchlets are rarely hairy, but are more robust 
than those of P. monilifera, which are glabrous. The leaves are slightly 
notched on their edges, of a pale light green ; and the petioles are yellowish. 
The leaves are protruded about the middle of May, much later than those of P. 
fastigiata, P. alba, or P. (a.) canéscens ; and, when they are first expanded, 
their colour appears a mixture of red and yellow. The catkins are shorter 
than those of P. trémula or P. alba; they appear before the leaves, in March 
and April; those of the males are of a dark red, and, being produced in 
2 nee wi es 
