Yes, if you click on the little bell there, you'll see that when you submitted the image and it was given a number in the database, you got a message saying that and announcing you received an acorn. For example
In the case when you have already submitted an image of a plant in that same category, you will get the same message minus the part about the acorn.
And all acorns aside, that is a tremendous set of photos, Stewart. I like the way you got the timing perfect on the opening of the flower, before and after only half an hour apart.