Stems shortly pubescent to ± glabrous. Corolla 50-140 mm diam., ± rotate; inside usually dull red to purple-black, with faint yellow transverse lines on rugulosities, sometimes smooth and shiny purple-black all over, densely hairy on united central part and on bases of lobes to nearly glabrous (except towards margins of lobes); lobes 25-55 mm long, 15-35 mm broad at base, spreading to reflexed. Corona: inner lobes usually uniformly dark purple.