This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Echinocystis lobata.
Gourd Family. July - Sept.
A rapid climbing vine 10 - 20 feet long. Found in rich, moist soil, beside streams and in waste places. New Brunswick to Kentucky, west to Manitoba and Texas.
Greenish white, small, in loose clusters from the leaf angles.
Deeply and sharply 5 - lobed.

Wild Balsam-apple.
 
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