350 
Salicaceee. 
branches. Ls broader in proportion than in the last. 
(1 : 2-4). 16 
16. Ls, when full-grown, glabr. Stas glabr. Style red. Type 
of S. Arbuscula ....... 17 
— Ls, also when full-grown, tomentose or villous-silken 
on both sides or at least underneath. Capsules gray- or 
white-tomentose. Stigs gen. 2-fid .... 18 
17. Ls gen. elliptic-lanceolate (the greatest breadth at the 
middle), closely glandular-denticulate, dark green, shiny 
and with prominent nerves above, glaucous underneath, 
rarely green on both sides. Catkins shortly stalked. 
Anthers red, at last violet-brown. A moderate sized 
shrub. S. prunifolia Ser., S. formosa Willd., S. thyme- 
lseoides Schl., S. foetida Schl., S. Arbuscula-foetida Koch. 
— Central Alp., fairly distrib., especially on silicious 
earth; G. W., Gemmi, Sandalp. 7 Arbuscula L. 2006. 
— Ls gen. obovate-lanceolate, crenate-dentate, the nerves 
prominent on both sides. Catkins slenderer (3—4 times 
as long as broad), at last much elongated, as also the 
branches which bear them. A low shrub of 1—IV 2 wi, 
with short, divergent branches. S. Arbuscula Wald- 
steiniana Koch p. p.—Limestone Alp. of north-eastern 
Switz.; Appenzell, Glarus, Chureralp, Pilatus, Unter- 
walden. 6 Waldsteiniana Willd. 2007. 
— Comp, also S. Myrsinites. 2. 
18. Ls denticulate-glandular, elliptic or elliptic-lanceolate, 
when full-grown green, rather shiny and gen. glabr. 
above, white-tomentose underneath with mixed hairs, 
rarely (v. velutina Ser.) villous-tomentose (more faintly 
above) on both sides, or (v. spuria Schl. Gaud., S. Ar¬ 
buscula-Lapponum Wimm.) glabr. above and faintly 
hairy underneath. Scales blackish towards the top or 
entirely. Stas gen. glabr. Style long. Gland 1. S. nivea 
Ser., S. arenaria Ser., S. Lapponum Koch p. p., S. glauca 
Heer.—Alp.; G. W. O. Yaud, Uri, Glarus, Appenzell. 6 
helvetica Vill. 2008.*) 
— Ls entire, lanceolate or elliptic-lanceolate, gen. villous- 
silken on both sides with long, straight and applied hairs, 
rarely (v. virescens) almost glabr. Scales yellowish, 
reddish or brownish towards the top. Stas hairy below. 
Style of a medium size. Glands 2. Catkins at last much 
elongated. S. sericea Ser., S. albida Schl.—High Alp., 
on granite and schist; G. T. W. Yaud, Grimsel. 7 
glauca L. 2009. 
*) The true S. Lapponum L. has ls and capsules less hairy, catkinB 
thicker, almost sessile, style longer and stigs almost always undiv., it belongs 
to the North of Europe. 
