1540 AKUUItKlUM AND FllUTlCETUM. I'A K 1 III. 



1'hi.s species is readily distingiiislieiJ from tlie remaining ones be- 

 longing to this section (with the exce|)tion of S. incubacea), by its 

 very silvery leaves and upright mode oi' growth. Both sexes arc 

 descriljcd in i'w^'. F/. ; the Cemale is figured in Sa/, IVob. and Hai/ne 

 Ahbild. There are plants at Woburn Ai)bcy, Henfield, and t'litwick 

 House, and also in the (ioldworth Arboretum. 



A 33. S. Don//1\y./ Smith. Don's, or the rHsli/-brancficdy Willow. 



Identification. Smith in F.ng. Fl., 4. p. 213. ; Forbes in Sal. Wob., No. 85. ; Hook. Br. FI., ed. j., 



p. VH.; Borrcr in Eng. Lot. SuppL, t. 2599. 

 Till- Sist's. 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^. 1322 ; and/ig. 85. in p. 1618. 



Spec. Char., Sfc., Leaves obovate-lanceolute, 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 bractca. (Sniit/t and Borrer.) Sent from 

 Scotland, as British, by the late Mr. George Don. It 

 Howers in May. (Stem 5 ft. or 6 ft. iiigh, with straight, 

 wand-like, round, leafy branches, of a reddish or rusty 

 brown, scarcely do\\ny, except when very young. Leaves 

 mostly alternate, but several of the lowermost pairs oppo- 

 site ; all nearly upright. Hat ; \\ in. long, uniform ; broadest, x^ 

 and most evidently serrated, in their u[)i)er 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. (Siiiif/i.) S. Doniann, in the female, which is 

 the only sex at present known to British botanists, assimilates to the kinds 

 of the group Purpureae, except S. rubra Hmls., 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 difli'ers from them in having its leaves silky beneath, 

 and its ovary stalked, and Mr. Borrer believes that, in the relation oi 

 affinity, it is nearest to .S'. fusca; but he notices that we are without the 

 means of jiroof, which the male flowers would afford. There are plants 

 at Woburn Abbey, Henfield, and Flitwick House, and in the (ioldworth 

 Arboretum. 



Group xii. Amb'igucc Borrer. 



Shrubs. 



idL 



S. finnu'irchica Willd. has been added to kinds included in this groui) by Mr. 

 Borrer. 



-* a 5-1. S. AMBi'uLA FJirh., Boirrr. The ambiguous Willow. 



Identification Borrer in Eng. Bot. Suppl., t. 27')3., who has adduced there the following references :— 

 " Ehrh. ; Willd. Sp. PI., 4. p. 700. ; Hook. Br. Fl., ed. 2., p. 418. ; Koch Comm., p. 49. ; Bluff', et 

 Fing. Fl. Germ., 2. 561." 



Synonymcs. Some are cited under the varieties treated of below ; S. ambigua Koch, part of, Koch 

 Comm., p. 49. 



The Sexes. Both sexes of var. a, the female of var. (3, the male of var. y, and the female of var. S, 

 are figured in Eng. Bot. Suppl. 



Engraving. Engl. Bot. Supj)!., t. 27.>3. 



Spec. Ctiar., ^c. Leaves oval, obovate, or lanceolate, slightly toothed, and having a recurved point ; 

 pubescent, somewhat rugose above, glaucous and having proniinini veins beneath. Stii)Ules half- 

 ovate, acute. Calkins stalked, upright, cylindrical. Ovary stalked, dcn.scly silky. Style very 

 short. Stigmas, short.'at length cloven. {Borr. in Bot. Suppl.) Indigenous on gravelly heaths, in 

 Sussex, Essex, and Suffolk ;and ha» been observed in Perthshire, Angusshirc, Caithnesc, Orkney, 



