In a botanical garden in Argentina there is a shrub with leaves of a
striking appearance. It looks as if a bug has been eating large chunks
out of the edges but, as the photo shows, this is how the leaves grow.

See

http://homepages.ihug.com.au/~richwrig/leaf.jpg

Can anybody identify this shrub?
BRBR

It looks a lot like Broussonetia papyrifera, in Moraceae. Likely very juvenile
foliage.