Natural objects abound in heraldry, and one category that gives especial delight are the many flowers and flowering plants that frequently occur A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P262. Like its close heraldic relative the cinquefoil, the quatrefoil is a rather sytlised flower showing four rounded petals, usually pierced by a circle at the centre.