Separating C. brunneum from the similar-looking C. rachodes is not too difficult, with C. brunneum having a simple ring and an abrupt bulbous base to the stipe. However, care is needed not to confuse these with the similar species C. molybdites, which has a green spore print. even though it's not known as of yet to occur in New Zealand. It does need to be confirmed if poisoning is to be avoided.