Just a quick entry, as much so that I don’t lose it as anything else.
Anna Neuper had written a book of brocading patterns, which was translated by Nancy Spies. But it turns out that her notebook wasn’t the only book of patterns from that general time and place. Ute Bargmann wrote an article about another such manuscript. The 11 page paper is available at Woven Bands, Medicines and Recipes: Cod. Pal. Germ. 551. The Adventures, Provenance and Contents of a 15th Century Manuscript Held at the Library of Heidelberg University in Germany. and includes several patterns for leaves that would look perfect for a headband or trim.
ETA Heather English was able to find a link to the original manuscript, which is available at http://digi.ub.uni-heidelberg.de/diglit/cpg551/0021/image