some of the named nodosa if not all of them are very large in comparison to a run of the mill plant. that's why it was named after it was awarded. it didn't have to be but it leads to a plants prominence and history. Cultivated then divided by propagation and or cloning an awarded plant makes money for the owner/grower(s). Which keeps us supplied with the latest and greatest plants. 'mas mejor' is another large nodosa. There are quite a few large flowered named nodosa. We should all endeavor to own one of each... but yours is very nice large flowered plant