Botanically -nothing !!
An interesting piece of history from the Society archives ,recently forwarded to me by a long standing member of the NPVS.
I am not sure that I agree about the comments on the rays.
It should be remembered in the end that all pansies are violas ,and all violas are violas.
The terms ( VIOLET and SILK -right hand side last note on the page showing blooms) belong almost exclusively to Exhibition Florist Pansy and Exhibition Viola blooms but sadly not bedders.
The attachments of blooms show a picture of Sue’s Choice(Fancy Pansy) illustrating the blotches and the second of Hugh Cambell the ray less (Exhibition Viola) for comparison.