Not sure if this plant is poisonous for my dog...?

My girlfriend says that she remembers it being some kind of cactus...it has long leaves that grow straight up out of the pot, they are about an inch wide, and have a zebra stripe pattern horizontally, the stripes being white or light green...they come to a point...almost looks like a wider, flatter aloe leaf...

Not sure if this plant is poisonous for my dog...?
Is it this?


http://home.howstuffworks.com/mother-in-...


or this?


http://home.howstuffworks.com/snake-plan...





I know that the first one is poisonous but do not think the second one is. Here is a list of ones that are:





http://animalpetdoctor.homestead.com/poi...





Did some further research and found out that it can make him/her sick if eaten:





http://www.ces.ncsu.edu/depts/hort/consu...
Reply:I think you may be talking about an aspidistra
Reply:Mother-In-Laws Tongue is not really poisonous. It's toxic. The common name is Dumb Cane. It affects the vocal chords. And, if your dog doesn't eat plants you don't have a problem.
Reply:Yes - it is one of many common poisonous plants.





See source for more info