Final answer:
The circumvallate papillae contain up to half of all taste buds and are located in a V shape at the back of the tongue.
Step-by-step explanation:
The lingual papillae that contain up to half of all taste buds and are arranged in a V towards the rear of the tongue are the circumvallate papillae. Each circumvallate papilla is surrounded by a groove and contains about 250 taste buds. They are considered the largest and most numerous taste papillae and are located in a V shape at the back of the tongue, making up the rear part of the tongue's anterior line.