"Stewart Robert Hinsley" wrote in message
...
In message , Donwill
writes
It's understand it's a cross S. Retusa x S. Myrsinifolia and is
described as a small prostrate shrub, probably suitable for the rock
garden, relativly fast growing producing attractive fresh green foliage
and effective ground cover. (From Willows The genus Salix, by Christopher
Newsholme)

According to the web there's (at least) two plants going by the name S. x
cottetii; the prostrate shrub you mention, and a large shrub growing to
8-10 feet. I'd believe that the name correctly refers to the former, but
when the OP describes the plant as a tree one wonders if that is indeed
what she has.
--
Stewart Robert Hinsley

Well I don't know, I'm not an expert, I've now had a look in my
"Bean"(eighth edition) and it says it's a cross between S. Retusa and S.
Nigricans and is described as a procumbent shrub. There may well be another
large tree having the same name, however, it should be fairly easy the OP to
decide which one it has. :-)

Donwill