This is not an answer to your question but I was taught that grapes are not
native to New England. Growing up in Connecticut we learned that grapes
were imports to the continent as were the settlers. The state motto of
Connecticut is "Qui Transtulit Sustinet" (He who transplanted them still
sustains them.) The Connecticut flag has three grape vines on it.

"ChrisV01" wrote in message
...
The area where I live (New England) has many wild grapes. I am told these
are
Concord grapes. However, I have noticed while most have the usual serated
pear-shaped or spear-shaped leaves, a few will grow leaves that become
three-pronged (trident) shaped. What is the difference between these two
types? Which is what? Are the trident leaves representative of a
different
species of grape or just some phase that Concord grapes go through?

Thank You