The hardy rare or exotic fruits I know of are; Yanagi and Janatsi Ichigo(Debregeasia longifolia or edulis), maypop, may apple, magnolia vine/five flavors berry, kousa dogwood, che, jujube, guomi and other relatives, goji and relatives, kiwi and kiwi relatives, haskap, Kaphal(Myrica nagi),Yumberry(Myrica rubra) Kazinoki(broussonetia kazinoki, Himalayan honeysuckle, possibly Trianaea speciosa, Paper mulberry(broussonetia papyfera), banana yucca, sunchoke, akebi(Akebia trifoliata), buckthorn berry, fuschia flowered gooseberry, a lot of opuntia, plum yew, texas persimmon, serviceberries, cloudberry. salmonberry, thimbleberry, strawberry raspberry(rubus illecebrosus), elderberry, mayhaw, figs and wild fig relatives like Ficus palmata, medlar, non tropical guava, ugni, babaco, possibly any rare South African, Himalayan, and Andean fruits can also be grown in 8b.