Fig. 490.—From the seal of Robert Fitz-Pernell, Earl of Leicester, <i>d.</i> 1206.
<p><br></p>
It is not clear whether this is intended to be a cinquefoil or a pimpernel flower.
<bdi><a href="https://en.wikipedia.org/wiki/en:Arthur_Charles_Fox-Davies" class="extiw" title="w:en:Arthur Charles Fox-Davies"><span title="British writer (1871-1928)">Arthur Charles Fox-Davies</span></a>
</bdi>
A Complete Guide to Heraldry.