This plant was a source of controversy when it appeared. While there seems to have been an actual 'Summer Joy' (see registration photo), a TC mix-up occurred and the plants released were actually 'Great Expectations'. The true 'Summer Joy' does not seem to exist anymore.

Summer Joy (Klehm NR)

Photo from AHS Journal Vol. 30 Num. 1 page 106. Registration is on page 114