Ixora originated from India and Sri Lanka, now popular in tropical America like Florida and Texas and other tropical countries of the world. My orange Ixora is gathered by my mother from relatives and neighbors, now already a permanent resident in our garden, as it is planted on the ground as hedges.
Lantana came from the tropical regions of America and Africa, later introduced to almost all places in the world. My orange lantana above is from a far province in the Visayas, which is Bohol, an island just recently hit by 7.2 magnitude earthquake. This is loved by our butterflies.