In article ,
says...
Guelder rose

Viburnum opulus fruit is not very nasty in small doses but eat any
quantity and the D&V can be bad enough to hospitalise you. It is
certainly not good for you in any quantity so leave it for the wild life
:~)
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea