I don't know about the rest of it, but the flowers look clearly like an ecclesiastical crown. See, ie, You are not allowed to view links.
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Why not royal? AFAIK, most Royal crowns were circlets at the time. It was the high ecclesiastical crowns that were "hats" were covered tops and a top decoration. Some Royal houses did have Coronation crowns, which covered the head with a peak, but they were highly decorative with jewels, AFAIK.
You can clearly see in the VM three (can't think of the word . the spiky bits) with a fourth repeated at the top. The little lines may depict fabric, or they may depict a halo.