trumpet flower n Mexican evergreen climbing plant having large solitary funnel-shaped fragrant yellow flowers with purple-brown ridges in the throat n woody flowering vine of southern United States; stems show a cross in transverse section n evergreen North American honeysuckle vine having coral-red or orange flowers Synonym(s) chalice vine cupflower Solandra guttata cross vine quartervine quarter-vine Bignonia capreolata trumpet honeysuckle coral honeysuckle trumpet vine Lonicera sempervirens