Myrtle

Time for a little Monrovia history about the naming of the city streets:

From the Monrovia Old House Preservation Group about the original Town of Monrovia Subdivision:

East and west running streets were given the names of trees: Lime, Lemon, Orange, Olive, and Walnut. North and south running streets were given the names of flowers and women: Magnolia, Primrose, Myrtle (Monroe’s daughter), and Charlotte (now Canyon).

and

When the town was laid out, the decision was made to name the streets running north and south after flowers and the streets running east and west after nut and fruit trees. The exceptions were Myrtle, which though a tree, was also the name of William Monroe's daughter, and Charlotte (now Canyon), daughter of Colonel Samuel Keefer who owned several subdivisions in early Monrovia.

Only slight differences between the above two items. These days, in the whole of Monrovia, there are many more exceptions to those first street naming rules. I just wanted to point out, and this is where the photo comes in, that Myrtle is the name of Monroe's eldest daughter, a type of tree and a flower.