Noel, in your pictures, the plant you said was infested with ants so you did not collect it might be Passiflora quadrangularis. Here are pictures of my plant without all the holes in the leaves. The leaf is similar, but the angular stem is the reason I thought this might be the same plant.
This passiflora is a more tender tropical variety, so would do well where you live. It is commonly known as "Giant Granadilla" and is supposed to produce football-sized yellow fruits. I have only had a couple of flowers on mine, but they are huge, beautiful purple flowers. When you go back, look up in the tree, to see if there are yellow fruits, or the big, purple flowers up higher where there is more sun. btw, the ants are not actually eating the leaves, they more likely are eating some other insects (or honeydew from them) that are eating the leaves.
Also, the low-growing plant with the markings on the leaves might be a Kaemferia, a low type of ginger. Here are pictures of mine, which have a similar variegation but this one has been bred for the color. Again it is a tender variety that goes dormant here, (that's why these look so scraggly) but where you are it would have leaves all year 'round. If you pull up a plant and smell the small rhizomatous roots, they will have a bit of a ginger-y scent that might help you to identify it. It blooms all summer here, with pretty little flowers that open in the mornings and finish by afternoon.
