Hurts (blue [roundels]) the same authority considers berries, and most heralds have taken them to be those diminutive things, whortleberries… But I am rather inclined with Leigh to consider them representations of the ‘black and blue’ contusions resulting from the “clumsy thumps” of war.

From The Curiosities of Heraldry by M. A. Lower

The torteaux (red [roundels]) called in the Boke of S. A. “tortellys, or litill cakys,” are said to be emblematical of plenty and to represent a cake of bread.

From The Curiosities of Heraldry by M. A. Lower