Forming on my Parodia Buiningii. Flower? Goiter?
This nodule started appearing at the growth point of my Parodia Buiningii in the winter. I thought it was a flower. It's been outside in a southwest location at our cabin in northern Vermont since May. As you can see, this cactus has kept growing, as the nodule has moved down the plant as it's put on new growth. However this growth, that I long thought was a flower forming, has stayed the same. It has has been the same shape/size/color for months.
Searching the internet, I can't find anything that looks like it forming on this particular plant. Any ideas?