They are all mosaic-patterned. The first two's parents are unknown, but the last two are from Native Spirit.
New Unidentified Sports From Seeds
Thank you very much. I think the last one could be Bombshell if Rosy Dawn's catalog is correct(see http://www.rosydawngardens.com/bombshell-367.html), while Bombshell becomes another different cultivar in Glasshouse Work's catalogue(see http://www.ghworks.com/trop-c2.html). So I am really confused.