In my hybrids, meaning those that haven't flowered yet, I see that they look more like finger limes, with miniature leaves, thin stems, and thorns. As for the fruit, it depends on what you're looking for. Hervalistic already has many hybrids with different Australian citrus fruits, which is interesting, but I mainly use Ellendale Tango as parents. I'm not sure what your goal was, but I used lemon since I want something acidic. However, if I wanted to make a sweet cross, I'd definitely use other relatives of the finger lime, perhaps Microcitrus inodora (but I don't have any) or Clymenia poliandra. It can also produce two types of pulp: Faustrime has juice vesicles that come out, like caviar, and Bloodlime juice comes out if you squeeze it. I don't know; more vesicles come out, so I'd like either of them for hybrids with lemon.