What kind of myrtle shrubs are there?

Two(2) is the kind of myrtle shrubs.

Specifically, the myrtle (Myrtusspp) can be found growing natively in two specific world regions. The common or true myrtle (M. communis) is an evergreen shrub of the entire Mediterranean region. The Saharan myrtle (M. nivellei) prefers the sparse mountain woodlands of Chad and southern Algeria.