1522 ARBORETUM AND FRUTICETUM. PART Itks 
¥ 25, S. Pursui4‘Né Borrer. Pursh’s Willow. 
Identification. Mr. Borrer suggests that this species may be called S. Purshidva, as there is an 
older S. ambigua. (Borrer in a letter.) 
Synonyme. S. ambigua Pursh Fl. Amer. Sept., 2. p. 617., Smith in’ Rees’s Cyclo., 36., Forbes in Sal. 
Wob., No. 154., Hook. Br. Fl., ed. 2., incidentally under S. ambigua Khrh, 
The Sexes. The male is described in Sal. Wob. 
Spec. Char., &c. Leaves lanceolate, pointed, serrated, glabrous ; shining above, 
glaucous underneath. Footstalks stout, glandular at the summit. Stipules 
half-heart-shaped, serrated, deciduous. Catkins accompanying the leaves. 
Stamens 2. Bracteas rounded and concave. (Sal. Wob., p. 282.) A native 
of North America, in low grounds; and flowering in March and April. 
This appears to be a rapid-growing tree, with round, greenish-brown, 
smooth branches. The leaves are from 5in. to 6 in. long, and about 13 in. 
in breadth, somewhat resembling those of S. Russellidna, but much broader, 
and more obtuse at the base; wherein they resemble those of S. fragilis ; 
they, however, differ from this species by their very white glaucous hue 
underneath; the serratures are, likewise, much coarser, and they are glandu- 
lar, which is very obvious in the young leaves, that are generally furnished 
with two obtuse glands at the insertion of the footstalks, which sometimes 
run into small leaflets. Footstalks stout, glabrous. Catkins appearing 
with the leaves. Stamens 2 in a flower. There are plants under the name 
of S. ambigua in the Hackney and Goldworth arboretums ; also at Woburn 
Abbey, and Henfield. 
App. 1. Fragiles introduced, but not yet described, or of doubtful 
Identity. 
S. adscéndens in Donald’s Nursery. This kind is extremely dissimilar to the S. adscéndens of 
Eng. Bot. and Sal. Wob. S. bigémmis‘Lodd. Cat., ed. 1836. Specimens were received from the 
Hackney and Goldworth arboretums, which appear quite different from the S. bigémmis of Hoff . 
mann, which is identified with S. daphndides Villars. S. decipiens, fem., Lodd. Cat., ed. 1836. S. . 
fragilis and S. murina Lodd. Cat., ed. 1836. S. rubra G. Loda. 
App. ii. Frdgiles described, but not yet introduced, or of doubtful 
Identity with introduced Species. “ 
S. frdgilis, mas et fem., Host Sal. Aust., 1. p. 5. t. 18, 19., Fl. Aust., 2. p. 635. S, fragétlior, mas et 
fem., Host Sal. Aust., 1. p. 6. t. 20, 21., Fl. Aust., 2. p. 636. _S. fragilissima, mas et fem., Host Sal. 
Aust., l. p. 6. t. 22, 23., Fl. Aust., 2. p. 636. ; synon. S. fragilis Host Syn., p.527. S. palustris, mas 
et fem., Host Sal. Aust., 1. p. 7. t. 24, 25. ; Fl. Aust., 2. p. 637. 8S. capénsis Thunb. Fl. Cap., 1. 
~p. 139., Smith in Rees's Cyclo., under No. 42., resembles S. babylénica, and is probably a variety 
of that species. S. subserrata Willd. Sp. Pl., 4. p. 671., Smith in Rees’s Cyclo., No. 45. (S. Sdfsaf 
be'liedi Forsk. Cat. Pl, Egypt., 76.), is described as having a leaf very like that of S. babylénica. 
(Rees’s Cyclo.) , : 
Group vi. Alba Borrer. 
Trees of the largest Size, with the general Aspect of the Foliage whitish. 
Pilly) 
Stamens 2 to a flower. Ovary glabrous. Flowers loosely disposed in the 
catkin. Leaves lanceolate, serrated with glanded serratures; hairy, espe- 
cially while young, with appressed silky hairs, which give to the foliage a 
light or whitish hue. - Plants trees of considerable height. (Hook. Br. Fl., 
ed. 2., adapted.) 
¥ 26. S. a’LBA L. The whitish-leaved, or common white, Willow. 
Identification. Lin. Sp. Pl., 1449. ; Willd. Sp. Pl., 4. p.710.; Sm. Eng. Bot., t. 2430.; Eng. FL, 4. 
pe Forbes in Sal. Wob., No. 136.; Hook. Br. Fl., ed.3.; Mackay Fl. Hibern., pt. 1, p. 247.5 
ayne Abbild., p. 254. ; Host Sal, Aust., 1. p. 9.; Pursh Fl. Amer. Sept., 2. p. 616. 
Synonymes. Salix Rait Syn., 447., Ger. Emac., 1389. with a fig. ; S alba, part of, Koch Comm., 
p. 16. ; the Huntingdon, or Swallow-tailed Willow. (Pontey’s Prof. Planter, ed. 1816, p. 92.) 
The Sexes. Neither is rare in England. Both are described in Eng. Fi., and both figured in Eng. 
Bot., Sal. Wob., Host Sal. Aust., and Hayne Abbild. 
Engravings. Eng. Bot., t. 2430. ; Sal. Wob., No. 136.; Host Sal. Aust., 1. t. 32, 33. ; Hayne Abbild., 
F te es our figs. 1314, and 1315.; fig. 136. in p. 1629.; and;the plates of this tree in our last 
olume, ; 
