Blazon: Argent a tower azure windowed sable, in chief a genet passant proper
In the twelfth century king Henry the second caused certain figures to be painted, which had a descriptive reference to his name; the planta genistae, or broom sprig, and a genet passing between two broom trees.
-From Inquires into the Origin and Progress of the Science of Heraldry in England by James Dallaway, p423
From Inquiries into the Origin and Process of the Science of Heraldry in England by James Dallaway, p425
The left (a genet, or a small mammal resembling a civet or mongoose, between two broom plants, or genêt in French) is an allusion to Henry’s family name of Plantagenet, and the right, an escarbuncle, is derived from the arms of the House of Anjou.