I noticed that WHSmith have the DK RHS Encyclopedia of Plants and
Flowers for a tenner at the moment, the one that's usally £35. Is that
any use to you? I can go and pick one up on Friday if you like. 

Haven't forgotten that I've got a copy of that (or something extremely
similar) here for you anyway, it's just in case this one is a newer
edition I thought I'd send a heads-up. :-)


-- 
"I can still see her face at thirty.
When will I be most myself?
I thought I'd always be their child.
In my sleep it's never winter."