Varieties of Fruit for SheHecheyanu

If one type of fruit has many varieties--such as navel oranges, Valencia oranges, kumquats, grapefruit, and other citrus fruits-- say she'hecheyanu on each type if the:
  • Trees have different leaves, OR
  • Taste differs from one another (taste must be noticeable to an average person). 
Note Since many fruits are often available year round, it may not be possible to ever say she'hecheyanu on those fruits.