About Vert:
In classical heraldry, vert is the name of the tincture roughly equivalent to the colour "green". It is one of the five dark tinctures (colours). The word vert is simply the French for "green". It is used in English in the sense of a heraldic tincture since the early 16th century. In Modern French, vert is not used as a heraldic term. Instead, the French heraldic term for green tincture is sinople. This has been the case since ca. the 16th century. In medieval French heraldry, vert also meant "green" while sinople was a shade of red. Vert is portrayed by the conventions of heraldic "hatching" (in black and white engravings) by lines at a 45-degree angle from upper left to lower right, or indicated by the abbreviation vt. when a coat of arms is "tricked".