Another example I found on the web, Kew Gardens herbarium image of Zornia harmsiana but I can't load the image, maybe another time it will open. I searched the herbarium for Zornia and found pages of them, some with images..
http://apps.kew.org/herbcat/ge...
I can't find a thing on Zornia orbiculata, but an image of Cotyledon orbiculata came up and the similarity in leaf shape is strikiing!
