Taste papillae of a smoker. They belong to Type 3 (thick and irregular surface) and Type B (elongated blood vessels) corresponding. This smoker used to smoke 20 cigarettes per day the last four years. He never complained for any specific taste disturbance.
Pavlos et al. BMC Ear, Nose and Throat Disorders 2009 9:9 doi:10.1186/1472-6815-9-9