balloon vine

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tendril-bearing vine (Cardiospermum halicacabum) widespread in tropical and subtropical regions, having small whitish flowers and bladderlike fruits.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A tropical perennial climbing vine, Cardiospermum halicacabum, having ornamental balloon-like fruits.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun woody perennial climbing plant with large ornamental seed pods that resemble balloons; tropical India and Africa and America