Regarded as a ramification of the Gothic, manifesting itself in the late 14th century in reaction to the elaboration, of flowing tracery and excessive ornament which, for some 50 years previous, had obtained in English architecture.
The exuberance of the early style gave way to straight, vertical, and horizontal lines emphasized by the addition of pinnacles, with door-ways and arches enclosed within well-defined square outlines, using buttresses merely as decorations.
Properly, the Perpendicular Style is an English art, and is inferior to the architecture it superseded.
Notable examples are King's College, Cambridge, and Edington, Wiltshire.
New Catholic Dictionary