can some one can tell my where i can found some information on the berberis
thunbergii BRBR

Berberis thunbergii is the common Japanese barberry which grows all over this
country. A Web search with Google or some other search engine will tell you
everything you need to know. It can be grown as a bonsai.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)