Just calyx.. Don't worry about it especially if it's the only plant. I've been growing constantly for 4 1/2 years and I've only had a hermie seed itself badly once and it didn't really effect the other plants much, just a few seeds. Only a couple seeds hear and there a few other times. I have chopped a few but they were obvious and it happened early in flowering because it was a genetic problem.. They happen but don't get overly concerned about it...