Hi Crystal Clover,
I don't know what your first plant is but the second one looks like Dieffenbachia 'Camille'.
For your first one feel free to look through the pics at this site.* Click on a letter and then you can point to the name for a thumbprint and click on the name for a larger pic and growing info.
I'd love to know if you id it.
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.