Sadly I don't have Stringer's Souvenir in my collection just now - it was a victim of last year's cold winter and I have not yet replaced my plant.
Stringer's Souvenir has light red semi double flowers which are very striking above the light green leaves which are edged in yellow. The leaves have a waxy feel to them. I find the plant needs a lot of pinching to keep it to a good shape as it does tend to grow straggly.
The plant was hybridised by the late Rev. Stanley Stringer, well known for introducing the Deacon series of dwarf pelargoniums.
The Pelargonium Register states that the plant had been given to Mary Spink, compiler of the Register, when visiting Rev. Stringer. Sadly he died before the plant was named and, in consultation with Allan Shellard, "the name was chosen as a celebration for all he (Rev. Stringer) has done in a lifetime of a great breeding programme."