1778 The Trees of Great Britain and Ireland 



is doubtful if these constitute distinct varieties ; on one tree I have observed ordinary 

 branches with small leaves, varying in shape from oval and slightly toothed to trilobed, 

 and more vigorous shoots showing large palmately lobed leaves. Old trees put forth 

 feeble long shoots, on which the terminal white leaves are often imperfectly developed. 



2. Var. subintegerrima, Lange, in Willkomm and Lange, Prod. Fl. Hisp. i. 233 

 (1861). 



Var. integrifolia, Ball, in Journ. Linn. Soc. (Bot.) xvi. 668 (1878). 



Populus subintegerrima, Dode, op. cit. 20 (1905). 



Populus monticola, Brandegee, in Zo'e, i. 274 (1890) ; Sargent, in Garden and Forest, iv. 330, 



fig. 56 (1891), vi. 190 (1893), and vii. 313, fig. 51 (1894). 

 Populus Brandegeei, Schneider, Laubholzkunde, i. 23 note, and 803 (1906). 



Leaves coriaceous, often sub-evergreen ; on the long shoots ovate or orbicular, 

 sub-cordate or cuneate at the base, sub-entire or irregularly and slightly toothed, 

 white beneath ; on the short shoots almost orbicular, slightly sinuate or quite entire, 

 grey beneath. 



A native of southern Spain, Algeria, 1 and Morocco, where it was gathered in 

 the greater Atlas by Hooker. It occurs also in the Canaries and the Azores. It 

 appears to have been introduced into Mexico by the Spaniards, and has been found, 

 apparently naturalised, along streams in the high mountains of Lower California, 

 where it is called guerigo by the inhabitants. According to Sargent, 2 who speaks 

 of it as a distinct native American species, its wood in this locality is quite unlike 

 that of the other poplars, being light red, satiny, and useful for making furniture. 



Similar forms 8 occur near Askabad, east of the Caspian Sea, and in Kashmir. 



3. Var. pyramidalis? Bunge, in Rel. Bot. Mdm. Ac. St. PMersb. vii. 498 (1851). 



Var. Bolkana, Lauche, ex Huttig, in Deut. Gart. 500 (1878); Masters, in Gard. Chron. x. 502 



(1878) and xviii. 556 (1882). 

 Populus Bolleana, Carriere, in Rev. Hort. liii. 40, 123 (1881), and lxiii. 188, fig. 48 (189 1); 



Masters, in Gard. Chron. xviii. fig. 96 (1882). 



Resembling the Lombardy poplar in habit. Leaves on the long shoots pal- 

 mately 3- to 5-lobed, very white tomentose beneath ; on the short shoots orbicular, 

 with coarse triangular teeth, green beneath with traces of tomentum. 



The fastigiate form of the white poplar was first described by Bunge from 

 specimens found by Lehmann in 1841, apparently wild 5 on the bank of a stream on 

 the north side of the Karatau mountain, between Bokhara and Samarkand. It appears 

 to have been introduced 6 in 1872 into Hoser's nursery at Warsaw, from a cutting 

 sent by Col. Korolkow. 7 Lauche procured it for the Horticultural Society of Potsdam 

 from the same source in 1875. 



1 Collected near Ronda in Spain, by M. P. Price, and near Affreville in Algeria by A. Henry. A specimen from Gibraltar, 

 in the Cambridge Herbarium, has slender female catkins, 4 to 5 in. long, with a woolly axis and pedicellate flowers ; scales 

 long, concave, irregularly toothed or lacerate ; styles 4, spreading. 



' In Garden and Forest, vi. 190 (1893). 3 Specimens in the Kew Herbarium. 



4 P. alba, var. croatica, Wesmael, in De Candolle, Prod. xvi. 2, p. 324 (1868) is an erroneous name founded on P. croaiica, 

 Waldstein and Kitaibel, in Flora, xv. 2 Beil. p. 14 (1832), which is a narrow form of P. nigra. Cf. Koch, Dendrologie, ii. 

 pt. i. p. 489 (1872). 



* Lehmann also saw it planted at Bokhara, where he gathered a leafless branch bearing staminate flowers, on 5th March 

 1842. Cf. The Garden, 10th Dec 1887, p. 543- 



' According to Carriere, Rev. Hort. lxiii. 188 (1891), it was introduced by Col. Korolkow, under the name of P. alba 

 pyramidalis into various places in France in 1878, as Orleans, Segrez, Angers; and was first sold by Simon-Louis in 1879- 

 1880. E. Mori en, in Belg. Hort. 1879, p. 269, says that it was sent to Spath from Tiflis by Scharrer in 1879. 



