School Assignment: Anyone know the name of this plant?

Hi,
I am doing an investigation in biology about continuous variation/polygenic inheritance in plants, and I am planning to measure the plants pictured below. The problem is that I need to know their common and scientific names for my write-up! Any ideas?







Thanks :)

 

1.,3. Cordyline terminalis
2. Solenostemon scutellarioides

 

Thank you so much!! You just made my day and made my write up a million times easier!