Hi
Anthurium would be a good choice if you can control the size. Do a google on the family there are hundreds of varieties but the most common are the pig tailed types or andreanum which is a trailer. The later will grow epiphyticly without substrate if the humidity can be kept high. No problem in a terr. lol They do best in bright filtered light but will tolerate very low levels don't expect a lot of flowers though. Water is no problem but watchout for fungus and botrytis. Some air circulation helps a lot. Your temps should actually be better for most of the family but again do a google on the family I'm sure you'll find one that will fit right in lol
Size is such a problem with terrariums even when they are 12x25 feet and 10 feet high. Okay that's much more like a greenhouse but same principle ?? gary

I had very good success with Anthurium gracile in a terrarium. I had a 70 gallon aquarium fitted with grow lights. However, the same scenario did not work with Anthurium amnicola.
Either way, do try to allow a little air movement. In their natural settings, Anthuriums tend to grow much like orchids, which are plants that are used to high humidity with good air movement.
Pepe

I looked up the grower on-line, and found a phone number. I was told that my anthurims would be named Smalltalk . One plant has a red flower. The other is not in bloom. From my reading there is a pink flowering and a red flowering Smalltalk. My spathiphylum, bought at the same time (and grown by the same grower), is 'Lynise.'

I guess I will go ahead and plant them in the terrarium, and see how they do, since this was my original intention, and I don't have any better idea for the terrarium right now.

Thanks everyone!

Uh uh don't be fooled. Small Talk turns into a regular sized Anthurium with time. I bought one when its was teeny tiny and eventually it morphed into a 3 ft plant.

A nice choice for a terrarium is A. scandens. Its like a trailing vining Anthurium that can easily be controlled by clipping back.

Another nice plant (if you can find it) that looks Anthurium-like and would stay small for a terrarium is Callopsis volkensii. It has very small spathe-spadix white blooms