>R. frangula has a new name. Its Frangula alnus now and has been
>since at least 1955. Its common name in Europe is also Alder
>Buckthorn, though of course its leaves are glossy.
Just a quick note: I know that it also goes by that name, however, in
Canada most people that know of its name at all call it Rhamnus frangula.
In fact, in Shrubs of Ontario, put out by the ROM, it is referred to as R.
frangula. I ordinarily wouldn't have even responded, but the remark sounded
a tad bit condescending (as words on a screen often can), and I decided to
stick up for myself. :)
>>Both species grow in Southern England where, in Hampshire, the
>distributions are very different. R cathartica grows on the chalk,
>while F alnus grows on the sandy more acidic ground. F alnus is not
>however tied to very wet ground but is found all over the suitable soils.
>>Neither are particularly invasive as natives, Salix cinerea and Salix
>caprea generally out compete F alnus and Euonymous europaeus and
>Cornus sanguinea (Thelycrania sanguinea) out compete R cathartica.
>Thus they are usually found as a large single shrubs, not dense stands.
> Pete Selby
>(pete.selby at zetnet.co.uk)