The stems to the Cup Plant, Silphium perfoliatum, are perfectly square with each side lined with a pale blond line. (not sure what the insect is in the middle, I didn't notice it when taking this picture.) They don't appear to be hollow, not that I've broken one open.
As you can tell form the lack of posts lately, there isn't much going on. At least not much that's photogenic going on. I will be trying to get some sort of content up to continue posting here a few times a week, but eventually I'm going to have to start raping youtube for content. Please try to bare with as we pass though the next few months.