1540 ARBORETUM AND FRUTICETUM. PAKT III. 
This species is readily distinguished from the remaining ones be- 
longing to this section (with the exception of S. incubacea), by its 
very silvery leaves and upright mode of growth. Both sexes are 
described in Eng. Fl. ; the female is figured in Sal. Wob. and Hayne 
Abbild. Thereare plants at Woburn Abbey, Henfield, and Flitwick 
House, and also in the Goldworth Arboretum. 
& 53. S. Donza‘Na Smith. Don’s, or the rusty-branched, Willow. 
Identification. Smithin Eng. FI., 4. p. 213. ; Forbes in Sal. Wob., No. 85.; Hook. Br. Fl., ed. 3., 
p. 424.; Borrer in Eng. Bot. Suppl., t. 2599. 
The Sexes. The female is described and figured in Sal. Wob. and Eng. Bot. The male has not yet 
_ been discovered. 
Engravings. Sal. Wob., No. 85.; Eng. Bot., t. 2599.; our fig. 1322.; and fig. 85. in p. 1618. 
Spec. Char., §c., Leaves obovate-lanceolate, partly opposite, acute, slightly 
serrated, even ; livid and somewhat silky beneath. Stipules linear. Branches 
erect. Catkins erect, cylindrical. Ovary stalked, silky, longer than the 
obovate bearded bractea. (Smith and Borrer.) Sent from © 
Scotland, as British, by the late Mr. George Don. It 
flowers in May. Stem 5ft. or 6ft. high, with straight, 
wand-like, round, leafy branches, of a reddish or rusty 
brown, scarcely downy, except when very young. Leaves | 
mostly alternate, but several of the lowermost pairs oppo- 
site ; all nearly upright, flat; 14 in. long, uniform ; broadest, 
and most evidently serrated, in their upper part, towards 
the point; green, minutely veiny, and glabrous above ; livid, 
or in some measure glaucous, as well as finely downy or silky, beneath, 
with a prominent reddish midrib, and slender veins; the silkiness less evi- 
dent on the older ones. Footstalks short, very broad at the base, paler 
than the branches. Catkins of female flowers appearing before the 
leaves, on short lateral stalks. (Smith.) _S. Donidna, in the female, which is 
the only sex at present known to British botanists, assimilates to the kinds 
of the group Purpiree, except S. ribra Huds., in the aspect of the branches, 
shoots, leaves, and catkins; in some of the leaves being opposite; and in 
the old bark being internally yellow, though less remarkably so than that of 
these kinds ; but it differs from them in having its leaves silky beneath, 
and its ovary stalked, and Mr. Borrer believes that, in the relation of 
affinity, it is nearest to S. fasca; but he notices that we are without the 
means of proof, which the male flowers would afford. There are plants 
at Woburn Abbey, Henfield, and Flitwick House, and in the Goldworth 
Arboretum. 
1322 
~Group xii. Ambigue Borrer. 
Shrubs. 
LJ 
S. finmarchica Willd. has been added to kinds included in this group by Mr. 
Borrer. 
*& % 54, S. ampr’cua Ehrh., Borrer. The ambiguous Willow. 
Identification. - Borrer in Eng. Bot. Suppl., t. 2733., who has adduced there the following references :— 
*“‘Ehrh.; Willd. Sp. Pl., 4 p. 700.; Hook. Br. Fl, ed. 2.,p. 418.; Koch Comm., p. 49. ; Bluff. et 
Fing. Fl. Germ., 2. 561.” 
Symonymnes, Some are cited under the varieties treated of below ; S. ambigua Koch, part of, Koch 
mm., p. 49. 
The Sena” Both sexes of var. «, the female of var. 8, the male of var. y, and the female of var. 3, 
are figured in Eng. Bot. Supe 
Engraving. Engl. Bot. SuppL, t. 2733. 1 
Spec. Char., &c. Leaves oval, obovate, or lanceolate, slightly toothed, and having a recurved point ; 
pubescent, somewhat rugose above, glaucous and having prominent veins beneath. Stipules half- 
ovate, acute. Catkins stalked, upright, cylindrical. Ovary stalked, densely silky. Style very 
short. “Stigmas short, at length cloven. (Borr. in Bot. Suppl.) Indigenous on gravelly heaths, in 
Sussex, Essex, and Suffolk ; and has been observed in Perthshire, Angusshire, Caithness, Orkney, 
