Those look like 'Matucana' to me. I prefer the appearance of the flowers
to that of the modern frilly monsters. If you don't want to reduce further
flowering by allowing yours to set seed, you could buy a packet of seeds
to distribute among your friends and relatives.

From url://http://www.rhs.org.uk/gardens/wisley/archive/wisleypomjun.asp:

"The original sweet pea was a purple & blue bicolour (two similar cultivars
are listed in modern catalogues as 'Cupani' and 'Matucana')"

Daniel

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