The acorn is the fruit of the oak tree; for that reason, it was considered a symbol of latent strength. It’s a period charge, found in the arms of Gilsburgh or Gillsborough, c.1490 [DBA2 350]. The acorn’s Society default is with stem to chief, which seems to be the opposite of medieval convention. An “acorn proper” is brown in Society armory.
The Shire of Far Reaches bears: Azure, a laurel wreath and in chief three acorns argent.
Roger Stockton bears: Azure, six acorns one, three, one and one argent.
Richenda de Cameron bears: Gules, three acorns Or.