Stems 20-60 mm long, 10-20 mm thick, 4-5-angled. Corolla 25-65 mm long, 15-60 mm diam., campanulate to bicampanulate; inside with larger obtuse conical papillae each tipped by clavate bristle 2-3 mm; tube 10-20 mm long, generally widening towards mouth; lobes 9-18 mm long, 15-17 mm broad at base.