The tropical epiphytic cacti Rhipsalis sp. are fun and interesting. R. paradoxa is one of my favorite. It looks like soda straws that have been pinched in alternating directions. Some other bromes like Tillandsias, while not providing water filled axils, may do well close to your light source. There are hundreds of different species. Most of the blooms are pretty and interesting, and many of them are miniatures. The wooly leafed ones need to dry off between mistings. It you have a high, relatively dry location, you might try Ceropegia woodii. I have grown the group as house plants, and tried the C. woodii in one vivarium. However, I had it placed near some falls and think it got splashed too much, so rotted. It is somewhat succulent, so doesn't appreciate wet roots at all. However, it is a fascinating little vine that looks like strings of small reticulated hearts, and the red-brown/checkered blooms are unique, for lack of a better term. They are of the same family as Hoyas (Asclepidaceae). The stinky succulent Stapelias, which blooms smell like carion are also related, but are decidedly cacti-like, so much of the family demands sun and somewhat dry conditions over all. I'm going to try the C. woodii again in a better location with my next project before giving up on it. The photo is a rooted cutting, but it is definitely a hanging vine with maturity.

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Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
5 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
4 P. terribilis
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus