The Warden pear, although sometimes used as to mean "any long-keeping cooking pear

Pear

The pear is any of several tree species of genus Pyrus and also the name of the pomaceous fruit of these trees. Several species of pear are valued by humans for their edible fruit, but the fruit of other species is small, hard, and astringent....

", is thought to be what is now termed the "Black Worcester or Parkinson's Warden." They were used to make "warden pies."

Heraldry

The warden's pear is very rarely distinguished in blazon

Blazon

In heraldry and heraldic vexillology, a blazon is a formal description of a coat of arms, flag or similar emblem, from which the reader can reconstruct the appropriate image...

, if not in visual form, from the regular pear when there is a pun to be made on the name "Warden."