That is a likely pure sativa, and they can look like that. I too thought it might be hermie or male, but wispy buds scream pure sativa. It could yet hermie here and there, and it's still no crime. In fact, you may get a seed or 2. Sativas can take a long, long time to finish, and native African strains are known for that. The quality of the high changes. At 60 days it will be good but different from 90 days. Don't judge by the very tops. Gently fold the stalk over so you can inspect the underside of the buds. If they are green and fresh and clearly growing, and the calyxes are not fat, you can wait longer. Sativa high gets more complex as the plant matures. I like both the high and the flavor to be fresh, so I tend to pick a little early. All brown and dried pistils is too late for me. Looks like the yield will be low, but the high will be awesome! Congrats!