Of course, the image is not clear. I attach an image-processed photograph trying to explain how I see it. I think the illustration represents a single You are not allowed to view links. Register or Login to view., i.e. a kind of leaf. In Dracunculus, the spathe can be whitish / greenish, with an irregular border.
In my opinion, the central green area is the inner surface of the Spathe and the two white areas make part of the outer surface of the same Spathe. We can see the inside and the outside because the surface is curved forming something like a cylinder or cone. This spathe looks to me like a leaf, green on one side and white on the the other, that curved to form a closed receptacle.
As in the BNF manuscript, the spike at the center of the spathe is not represented in the illustration.
In my opinion, the central green area is the inner surface of the Spathe and the two white areas make part of the outer surface of the same Spathe. We can see the inside and the outside because the surface is curved forming something like a cylinder or cone. This spathe looks to me like a leaf, green on one side and white on the the other, that curved to form a closed receptacle.
As in the BNF manuscript, the spike at the center of the spathe is not represented in the illustration.

