I had this blemish on many of my Antirrhinum leaves this year and was wondering what they might be. Could they be possibly a fungus or a leaf-mine of some kind? 5mm to 10mm in size approx'.
I don't think it is a leaf-mine - miners eat out the inner tissue of the leaf, leaving the upper and lower cuticle intact. Sue
Thank you Sue!
Is there anything different visible on the underside of the leaf?