48 
SALIX 
aurita x phylicifolia ; 97 [fide Enander], as 5 . arbuscula x nigricans 1 ; 103 ; 104, as S. nigricans x phylicifolia ? ; herb. 
Marshall, as 5 . ? myrsinites x phylicifolia ; 704, as 5 . phylicifolia x repens ; 1 169, as 5 . arbuscula x nigricans. 
In the field, many plants occur which cannot be referred positively either to S. phylicifolia or to S. nigricans, 
but which are obviously more or less intermediate between them. The intermediates fill the rather narrow gap 
between the two species ; and it seems hopeless therefore to frame a description which will include all the 
intermediates and exclude the two supposed parents and their varieties. As there is no experimental knowledge 
to draw upon, the only available method of determining the supposed hybrids is to become acquainted with the 
characters of the two species, and to regard as possible hybrids those examples which then appear to be inter- 
mediate, and which only occur in localities where both species are found. It is found that such intermediates 
frequently possess the duller and more pubescent twigs and leaves of 5 . nigricans and perhaps its larger 
stipules combined in varying degrees with the more shining and glabrous twigs and leaves and the smaller 
stipules of S. phylicifolia. It is obvious, however, that little agreement can be expected at present either in 
the determinations of these supposed hybrids or their putative parents. 
With the parents ; Ireland — planted in co. Westmeath. 
Hybrids of S. nigricans and S. phylicifolia have also been recorded for Scandinavia, Germany, northern 
Russia, and central Europe ; but most of the records for central Europe refer to cultivated plants. Doubtless, 
however, the hybrids in question are as widespread as the putative parents. 
S. phylicifolia x purpurea (see page 67). 
>S. phylicifolia x repens Andersson Monogr. Sal. 156 (1867); A. et G. Camus Classif. Saul, ii, 170 
(1905); v. Seemen in Ascherson und Graebner Syn. iv, 257 (1909); S. schraderiana Willdenow Sp. PL iv, 695 
(1806); x S', schraderiana Andersson in DC. Prodr. xvi, pt. ii, 251 (1868). 
leones: — Reichenbach Icon. t. 564, fig. 2003 [1203], as S. phylicifolia, fide Andersson, loc. cit.-, A. et 
G. Camus op. cit., Atlas ii, t. 10 (43) fig. U — Z', as x S. schraderiana. 
Exsiccata : — E. F. et W. R. Linton, 95; herb. Marshall, 704, 71 1 ; Wimmer {Sal. Wimmeri Rel. ), as S. 
schraderiana. 
Rare and critical. White {op. cit., p. 395) thought this might be a British plant. Since then, it has been 
recorded for Perthshire and Aberdeenshire. 
Recorded also for Sweden, Germany, and central Europe. Known best as a plant of Botanic Gardens, often 
under the name of S. bicolor. 
Series xi. Rosmarinifoliae 
Rosmarinifoliae Borrer in Hooker Brit. FI. 419 (1830) including Fuscae p. 420; Argenteae Koch Sal. 
Comment. 46 (1828); v. Seemen in Ascherson und Graebner Syn. iv, 123 (1909); Repentes A. et G. Camus 
Classif. Saul. 45 (1904); v. Seemen op. cit. p. 58. 
For characters, see page 29. 
Species and hybrid of Rosmarinifoliae 
[S. rosmarinifolia (see below). Laminae longer and narrower than in S. repens , about 6 or 
more times as long as broad, about 7 — 12 nerved. Catkins ovoid or subglobose, sessile or subsessile.] 
14. S. repens (p. 49). Laminae not more than about 3 times longer than broad and often 
much broader, about 5 — 7 nerved. Catkins usually more elliptical. Pistillate catkins often distinctly 
peduncled. 
5 . repens x viminalis (p. 51). Young branches, buds, leaves and catkins stouter than in S. rosmarinifolia 
to which it has a superficial resemblance. 
[tSALIX ROSMARINIFOLIA] 
Salix pumila rhamni secundi clusii folio Dillenius in Ray Syn. ed. 3, 447 (1724). 
Salix rosmarinifolia L. Sp. PI. 1020 (1753); Smith FI. Brit. 1062 (1804)!, including S. arbuscula 
p. 1050!; Syme Eng. Bot. viii, 248 (1868); 5 . repens subsp. rosmarinifolia A. et G. Camus Classif. Saul, ii, 78 
(1905); S. repens race rosmarinifolia v. Seemen in Ascherson und Graebner Syn. iv, 127 (1909); Rouy FI. 
France xii, 208 (1910). 
leones: — Smith Eng. Bot. t. 1365; t. 1366, as S', arbuscula ; Forbes Sal. Woburn, t. 87; t. 86, as 
S. arbuscula-, FI. Dan. t. 2556; Reichenbach Icon. t. 588, fig. 2038 [1238], as S. angustifolia ; t. 591, fig. 1242; 
Hartig Forst. Culturpfi. t. 50. 
1 S. arbuscula x nigricans Briigger in fahres. Naturf. Gesellsch. Graub. xxiii et xxiv, 117 (1880) nomen; * S. kraettliana 
Briigger op. cit., xxv, 105 (1882). Judging by Enander’s identifications of British plants referred to S. arbuscula x nigricans, 
this putative hybrid can scarcely at present be admitted as British. 
