40 
SALIX 
Rare ; wet rocks in the sub-Alpine and Alpine regions of central Scotland; Argyllshire, Perthshire, 
Forfarshire; also reported for Dumfriesshire, Aberdeenshire, and Orkney; from about 120 to 800 
metres. 
Northern Europe (to 68° N.) ; mountains of western and central Europe (2500 m. in the Alps), 
Pyrenees, Balkans; Caucasus (3330 m.) to China, North America, Greenland. 
>S. arbuscula x herbacea Floderus in Sv. Vet. Akad. Handl. xvii, iii, i, 48 (1891); A. et G. Camus 
Classif Saul, ii, 241 (1905); v. Seemen in Ascherson und Graebner Syn. iv, 324 (1909); x S. simulatrix White 
in Joiern. Linn. Soc. xxvii, 439 (1890)!. 
Exsiccata : — E. F. et W. R. Linton, 67, 96 ; herb. Marshall, 48, 69, 3468. 
White referred specimens collected in Perthshire to S. arbuscula x herbacea. On one of White’s sheets (no. 496), 
Enander has written “ S. herbacea x lanata forma subherbacea mihi.” Of Mr Marshall’s plants named x .S', simulatrix by 
White, one is herb. Marshall, 48: this is named by Mr Marshall “ S. arbuscula L. forma (or possibly 5 . arbuscula x herbacea)’’ ; 
another is herb. Marshall, 69: this is barren, and named by Mr Marshall “ S. herbacea x my rsinites}” . 
Rare and critical. Perthshire and Argyllshire. 
S. arbuscula x herbacea is also recorded for Sweden and Switzerland. 
S. arbuscula x lapponum Wimmer in Denkschr. Schles. Gesellsch. 167 (1853); Floderus in Sv. Vet. 
Akad. Handl. xvii, iii, i, 39 (1891); A. et G. Camus Classif. Saul, ii, 239 (1905); x S. spuria Andersson in DC. 
Prodr. xvi, pt. ii, 279 (1868); White in Jour?i. Linn. Soc. xxvii, 430 (1890). 
leones: — A. et G. Camus Classif. Saul, ii, Atlas t. 15 (48), fig. E — G, as x S. whitiana 1 . 
Exsiccata : — E. F. et W. R. Linton, 46. 
Judging from the remarks of White, there seems to be a series of intermediates or hybrids of S. arbuscula and 
S. lapponum, some examples showing “ more affinity with one parent than the other,” and others being “ tolerably 
intermediate in character.” 
From S'. arbuscula such plants “may be distinguished generally by the duller colour of the 
leaves which are more or less... pubescent..., by the finer and more scanty serration of the leaf- 
margins, by the longer shape of the catkins , longer styles, and usually narrower scales \_ — bracts] 
darker at their tips ; and from S. lapponum by the firmer and more shiny leaves which are more 
nearly glabrous and have more or less serrate margins, by the smaller catkins with short leafy 
peduncles, and by the short stigmas" (White loc. cit.). 
Some of such plants are with difficulty distinguished from certain forms of S. arbuscula x phylicifolia ; and in the 
ensemble it is not unlikely that forms occur which correspond to S. arbuscula x lapponum x phylicifolia (Floderus in Bih. Sv. 
Vet. Akad. Handl. xvii, iii, i, 41 (1891)). 
Perthshire, between 610 and 730 m. 
Recorded also for Sweden. 
5 . arbuscula x myrsinites Floderus in Bih. Sv. Vet. Akad. Handl. xvii, iii, i, 47 (1891); A. et G. 
Camus Classif. Saul, ii, 243 (1905); v. Seemen in Ascherson und Graebner Syn. iv, 240 (1909); x S. serta 
White in fourn. Linn. Soc. xxvii, 436 (1890). 
White [loc. cit.) described his x S. serta from a specimen in Syme’s herbarium (in the possession of Mr F. J. Hanbury) 
labelled “ Salix arbuscula, Breadalbane mts. [Perthshire], Lyon,” and also from “a scrap in the same herbarium labelled 
“ Salix prunifolia , Breadalbane mts. [Perthshire], J. D. Hooker.” 
Also recorded for Sweden and Switzerland. 
►S', arbuscula x nigricans (cf. page 48, footnote) ; S. arbuscula x phylicifolia (page 45). 
5 . arbuscula x reticulata A. et G. Camus Classif Saul, ii, 239 (1905). 
leones : — A. et G. Camus op. cit., Atlas ii, t. 14 (47), fig. Z et Z — B. 
A specimen in Herb. Mus. Brit., by R. Brown, 1793, from Ben Lawers, Perthshire, is referred by Enander to 
S. arbuscula ? x reticulata. 
Also recorded from Sweden, Switzerland, and the Tyrol. 
1 x S. whitiana A. et G. Camus op. cit. p. 239 = S. arbuscula x lapponum A. et G. Camus loc. cit. After F. B. White 
(1842 — 1894), the leading Scottish Salicologist. However, the name x S. whitiana was published later than the synonym 
x S. pseudospuria Rouy Rev. Bot. Syst. 181 (1904). 
