No. Blueberries, like most other flowering plants, contain both
male and female parts in each flower. However, a lot of blueberry
varieties are not self pollinating, so when purchasing plants, it's
a good idea to buy two different varieties to ensure that you will
A couple of species that have male and female parts on separate plants are the marijuana plant, the ginko tree, and kiwis.
Generally, when being sold, the plant will specify what gender it is. Many fruit trees are not self pollinators, so it's always a good idea to buy two different types.