When you crawl into a Nasturtium, you start to understand the growing process a bit better. Today I discovered that this 'case' probably is the container of seeds. A suitcase, that's packed and on it's way to different outlooks.
Gorgeous. I love your idea of a "suitcase of seeds". We have a lot of popping in our garden at the moment from one of your ' suitcases' on our Euphorbia Mellifera.