Houseplant or Hogwarts spell?

Upon noting with friends how both botany and Harry-Potter-verse utilize a fair amount of faux Latin, I thought it might be fun to make up a quiz similar to that "IKEA product or Lord of the Rings character?" one that was going around a while back. We can call this one...

Houseplant or Hogwarts spell?

Let's go! What are the following--plants or spells? Get out your wands and try casting them:

1. Alohomora!
2. Ficus Elastica!
3. Gloriosa Superba!
4. Protego Horribilis!
5. Wingardium Leviosa!
6. Hedera Helix!
7. Salvio Hexia!
8. Furnunculus!
9. Dieffenbachia!
10. Dracaena Marginata!

( Answers below the cut )