840 ARBORETUM ET FRUTICETUM BRITANNICUM. 
from moisture in the soil during winter, the alleys between the beds may be 
deepened, so as to act as drains. In the nursery lines, the plants require 
very little pruning, and their after-care, when in plantations, is equally simple. 
& ¥ 2. B? A.) pAu‘rica Pall, The Daurian Birch. 
Identification. Pall. Ross., 1. p. 60.; Willd. Sp. Pl., 4. p. 463.; N. Du 
04. 
Ham., 3. p. 2 
Synonymes. B. excélsa canadénsis Wang. Beitr. p. 86.; Bouleau de 
AS rT Siberie, Fr. ' 
; Bog Engravings. Pall. Ross.,1. t. 39.; Willd. Baum., t. 1. f.3. and 4.; and 
our fig. 1529. < 
Spec. Char., Sc. Leaves ovate, narrow at the base, 
quite entire, unequally dentate, glabrous. Scales of 
the stroviles ciliated on their margins ; side lobes 
roundish. (MWilld.) A deciduous tree. Dauria, and 
part of Asiatic Siberia ; but not in European Siberia, 
nor in Russia. Height 20ft. to 30ft. Introduced 
1796. Catkins whitish brown, larger than those of the 
common birch; February and March. Fruit brown; 
ripe September. Decaying leaves red or yellow. 
Variety. 
u ¥ B. (? A.) d. 2 parvifolia Hayne Dend. p. 167, — 
Leaves smaller than those of the species. 
b 
1529. B, daurica. 
& 3, B.(? A.) FRuTICO'sA Pall, The shrubby Birch. 
Identification. Pall. Ross.,1. p. 62. ; Willd. Sp. Pl., 4. p. 466. ; N. 
Du Ham., 3. p. 208. 
Synonymes. B. himilis Schrank Sal. p. 56.; B. quebeccénsis 
Schrank der Gesells. Naturf. Freunde, 5. p. 196. 
Engravings. Pall. Ross., 1. t. 40.; Dend. Brit., t. 154.; and our 
Jig. 1530. 
Spec. Char, §c. Leaves roundish-ovate, nearly 
equally serrate, glabrous. Female catkins oblong. ;“\ 
(Willd.) A deciduous shrub, Eastern Siberia, ; 
Germany, and Canada. Height 5 ft. to 6 ft. in 
moist situations, but much higher on mountains. 
Introduced in 1818. Catkins whitish brown ; 
February and March. Fruit brown; ripe in ‘ ? 
October or November. 1530. B. fruticdsa. 
aw 4. B.(? A.) pu'Mita L. The hairy dwarf Birch. 
Identification. Willd. Sp. Pl., 4. p. 467. ; Pursh Fl. Amer. Sept., 2. p. 622.; N. Du Ham., 3. p. 207. 
Synonyme. B. nana Kalm Itin. 2. p. 263. 
Engravings. Jacq. Hort. Vind., t. 122.; Dend. Brit., t. 97.5 and our fg. 1531. 
Spec. Char., §c. Branches pu- } 
bescent, without dots. Leaves 
roundish ovate, on long foot- 
stalks, densely clothed with 
hairs on the under surface. 
Female catkins cylindrical. 
Willd.) A deciduous shrub. 
anada, in bogs, and on high 
mountains in New York and 
Pennsylvania. Height 2 ft. 
to 3ft. Introduced in 1762. 
Catkins whitish ; May and 
June. ,Fruit brown, 
The root is red, and is used 
for veneering and inlaying. 
1531. B.(?A.) pamila. 
a 5. B.na‘na L. The dwarf Biren. 
Identification. Lin, Sp. Pl. 1394. 5 Eng. Fl., 4. p. 154. Pursh Fl. Amer. Sept., 2. p. 262. 
