Corolla 9-18 mm diam.; outside dark purple-red changing to green towards base; inside often slightly rugulose, velvety maroon to purple-black on lobes and mouth of tube (sometimes right to base of tube with bands of white) with cream to white in tube where sometimes with maroon rings or bars and spots, with numerous papillae around base of lobes and in corolla tube each tipped with an ascending bristle; lobes 5-8 mm long, 2-4 mm broad at base, strongly folded back down middle, tapering gradually from base to acute tip to narrowing only near end to obtuse tip. Corona 2.3-3.0 mm diam., purple-black becoming yellow towards base; inner lobes with ± pyramidal to obtuse dorsal projection ranging from larger than outer lobules to absent.
Home