Cydista and Pachystegia, are related to what?
Pachystegia Pachystegia is a genus of shrubs in the daisy family described as a genus in 1925.
Thetis Thetis ( ; Greek: Θέτις ] ), is encountered in Greek mythology mostly as a sea nymph or known as the goddess of water, one of the 50 Nereids, daughters of the ancient sea god Nereus.