The bulrush with red flowers refers to the name of the town (bulrush plants are called "juncos" in Spanish).
Juncos seem to be birds ("Junco" = "reed", Santiago Dotor), but the drawing on the flag looks like a plant.
Divided into four quarters and presented to the viewpoint of the observer, the shield presents upper left and lower right vertical stripes gold (or yellow) and gules (red) in reference to the region of Valencia, Spain, and to its denomination as "Town of Valencia".
PuertoRico, the smallest of the Greater Antilles, includes the main island of PuertoRico and a number of smaller islands and keys, including Mona, Vieques, and Culebra.
PuertoRico's formal Chief of State is the President of the United States; however, most of the executive functions are carried out by the governor.
A non-voting Resident Commissioner is elected by the residents of PuertoRico to the U.S. Congress.