What are tridentata and nephrophylla?

Are they tropicals that need special soils or can they live happily in in sand and peat? Do they have to be in a terrarrium or can their pots be put on a windowsill? Lastly, just cause I'm curious, where do these plants come from? I hope to get these plants soon and I want to treat them right.

Thanks for the info

I've had them both grow and flower well in a standard peat/sand mix standing in water. They are in my terrarium which doesn't have especially high humidity, but its fairly warm and brightly lit.

I don't suspect that you will have much trouble with them.