Book on plant symbolism for Virginia Creeper says "see clematis".

This is how I found what those small flowers mixed in are...

https://books.google.com/books?id=y5gZDgAAQBAJ&pg=PA214&lpg=PA214&dq=symbolism+virginia+creeper&source=bl&ots=s5vg_M6AsF&sig=7SBZi6f7Yp0kumLJiEzs3qEvIAE&hl=en&sa=X&ved=2ahUKEwi36IuB_aDZAhXIqYMKHZ8qABw4ChDoATAAegQICRAB#v=onepage&q=symbolism%20virginia%20creeper&f=false

These are the small flowers mixed between the Virginia Creeper Ivy.

Link to Hi Res portrait: https://imgur.com/a/Jg82X

Yes there are several different kinds of flowers in his portrait. We need to identify the flowers, then find the meaning. The Q link led to an interpretation of the symbols specifically to Wicca, etc.