Mammillaria echinocactus echinopsis before blooming. The buds are becoming visible around the last ring of wooly aeroles. This picture was taken on January 20, 2013.
This is the same plant on February 13, 2013. The buds are beginning to open.
On February 19, 2013, more flowers are showing with more on the way, as you can see many buds popping out of the top of the cactus.