Diplopterygium longissimum dip·lop·te·rygiumlongissimum uncommon noun 1. large scrambling fern forming large patches to 18 feet high; Pacific region and China Synonymsgiant scrambling fernDiplopterygium longissimum Related words Broader terms fern Parts Diplopterygium WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
