Noel, what beautiful pictures, and interesting plants. The little orange triangular flower is Tigridia pavonia, common name Mexican Shell Flower. They sell in spring bulb catalogs here - be sure to dig deep and get the bulb if you collect it. They also come in purple, pink, white and yellow.
I'm surprised to see carnations, pansies and gazanias growing in your pictures from the park. I guess the elevation allows the weather to be cool enough for them, right down there on the equator, yes?