#1 - I'm pretty sure it's an S. rubra of some sort.
#2 - definitely S. minor
#3 - hard to say from pic, could be S. leucophylla or a hybrid with it, perhaps leuco x rubra
#4 - definitely a hybrid with S. psittacina, I see no fenestrations, so I don't think it's psittacina x minor, maybe psittacina x flava or rubra.
#5 - can't say just from phyllodia