I do not know the species. But as it is tropical...
Caliandras are quite popular as flowering bonsai in tropical countries. They have these "Pom-Pom" rose, red or white flowers, and they like heat (as you said) and to be outside.
Some examples:
This message has attachments images. Please log in or register to see it.
The following user(s) said Thank You: leatherback, Albas
