plants id

please help me id these 2 plants.

 

The first one is a dwarf cultivar of Tabernaemontana.

 

3 maybe Cereus.

 

Or Echinopsis.

 

will this image help?

 

This one for instance is likely to be encountered.

echinopsis peruviana - Bing images

But there are a lot of different species of cacti, with many generally similar ones actually being placed in different genera from one another.

 

thanks, guys. the owner of that plant would like to know its name. the flowers bloom only in the morning and it has small red fruit unlike the dragon fruit which is big.