Well found, Michelle.
There is little doubt that this figure is meant as a floral embellishment; in the fig. 30 of the article you linked, it is even on a stalk like a flower. To some extent, it seems like the logical consequence of the "building blocks" this artist likes to use for his embellishments. That is, a disk with four disks attached. A disk with four "spikes". And so on. Combine them all, and you get our symbol.
The major difference seems to be the lack of a "donut" in the middle, which is present in Hildegard and the VM. And the color.
Interestingly, in his figure 34, it is placed in the sky/ceiling, and there it does get the central "donut".
There is little doubt that this figure is meant as a floral embellishment; in the fig. 30 of the article you linked, it is even on a stalk like a flower. To some extent, it seems like the logical consequence of the "building blocks" this artist likes to use for his embellishments. That is, a disk with four disks attached. A disk with four "spikes". And so on. Combine them all, and you get our symbol.
The major difference seems to be the lack of a "donut" in the middle, which is present in Hildegard and the VM. And the color.
Interestingly, in his figure 34, it is placed in the sky/ceiling, and there it does get the central "donut".