I ordered several swamp rose (Rosa palustris) to try as riparium plants and I hope they will be here early next week. Swamp rose is similar to other native US roses--with a scrambling growth habit, lots of thorns and papery pink flowers--but it is adapted to grow in wet, swampy soil. I hope that it will grow to riparium conditions.
Because of their cold winter dormancy requirement, most kinds of northern temperate plants are not good choices for growing indoors, but I have seen several examples of roses grown hydroponically year-round, so I wonder if this plant might be able to adapt. If it looks like it needs a winter dormancy next fall I might be able to store it in the fridge for a few months right in the riparium planter. I'll see what happens.