This Phyla nodiflora (Frog Fruit, Sawtooth Fogfruit, Turkey Tangle) is a groundcover that was planted at several parts of HortPark.
It has tiny flowers that reminded me of Lantana camara. But it is not surprising considering that it is also from the Verbenaceae Family.
Interestingly, it is also a host plant to one of the Pansy butterflies.