Fantastic! But that's not a nubbin, right D.? That's clearly a root. If I understand the definition of nubbin, it could be either a root or growth, but the person responsible for the term has to set the record straight. Go for it Dorothy!
... well .. it started as a nubbin and has evolved - it's actually out of it's nubbiness ...
BUT!
if you want to.. you can refer to it as 'a nubbin and then some'