Second plant seems to be the member of Lamiaceae family. Most probably Nepeta species.

Hi Eric:

The first one looks like Araujia sericifera of the Asclepiadaceae but this is just a guess without the flower/fruit to confirm it.

Best regards

José Gabriel

I disagree with Araujia sericifera.

Hi, Eric,

the first one looks to me like a Philodendron, probably gigas.

Second one I dont know.

lg aus Graz, Peter

Second one looks like a Vitis sp. Does it have fruit?

I disagree with Philodendron gigas and Vitis sp. Philodendron gigas is a monocotyledonous plant species. However, the image 1 depicts a dicotyledonous plant species.

I first one could be a species of Abutilon or Convolvulus, I think.

 I fully disagree with Abutilon and Convolvulus.

Many thanks for your valuable suggestions. Unfortunately these plants didn't flower until now, which would be helpful for their identification.

The plant in the first three photographs may be some species of Vitaceae. The other plant is not familiar.

I tried to post my answer yesterday, sorry if it is repeated:

Species in the first three photographs looks very much like Doyerea, Cucurbitaceae, from the neo-tropical dry forests. It is dioecious, so if it is flowering, you should check: all plants in an individual would be either staminate (male) or pistillate (female).

It is not Doyerea.

Maybe this FB group could be helpful (If you are on Facebook)

https://www.facebook.com/groups/181851861948893/

1st one may be a member of Vitaceae or Menispermaceae.Please chek.

Thanks for all your help. We now have several leads we can investigate in more detail.