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. The trefoil may originally been a representation of a specific plant (perhaps shamrock) but it has been used as a symbol almost since the beginning of heraldry and over time has adopted a stylised aspect. A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Trefoil. Guillim believes that it signifies “perpetuity…the just man shall never wither”. A Display of Heraldry, J. Guillim, Blome, London, 1679, P109