Thanks David! You're really right about the aerial roots. Here's an update on just a few of the succulents on my tree... Last year I sowed a gazillion seeds from my largest Echeveria directly on the tree. To my surprise...perhaps only a few days later I started to notice a gazillion tiny seedlings sprouting up wherever there was a bit of moss. I had no idea that Echeverias were so easy to grow from seed. Here are a few pictures of the larger seedlings... There are two or three large seedlings growing in the root basket of Dendrobium speciosum... Other succulents in that photo are Graptopetalums, Crassulas, Othonna capensis, Crassula streyi, etc. Here's a large Echeveria seedling growing in the root basket of an Ansellia africana... This one is growing beneath a Begonia boliviensis... Another Echeveria on the tree is Echeveria nebularum... It's an epiphytic succulent from Mexico. Other succulents in the photo include... Crassula spathulata, Cissus tuberosa, Peperomia urocarpa, etc. Here's a photo of the shady side of the same branch... Succulents in this photo include...Aeonium Kiwi, Graptopetalum, Peperomia graveolens, Kalanchoe NOID (purchased as K. manginii), a small Echeveria, Kalanchoe marnieriana, etc. Here's a closer shot of the Peperomia... Peperomia graveolens and Crassula streyi both have nice reddish coloring on the underside of their leaves so in this regard they are well suited to growing epiphytically. Here are a couple different Echeveria roseas that I added last year... Echeveria rosea grows epiphytically in Mexico. It's one of the most cold hardy Echeverias and is grown outside year around in parts of England. Not sure why it's not more commonly grown here in Southern California as it can color up nicely when in bloom. During summer I water the tree every other night via drip system. During winter I water the tree first thing in the morning around 3-4 times per month. Many of the succulents seem to be able to survive indefinitely on just the plain bark of the tree...but they go into bonsai mode. In order to thrive they need some moss and/or detritus. I've also tried using coco fiber but it just doesn't retain enough moisture. What works pretty great is coco fiber with a layer of New Zealand Sphagnum on top. Here are some other photos of succulents growing epiphytically... Agave Cactus Cactus Cactus Cactus Crassula multicava Cyphostemma currorii Dudleya Echeveria alata Echeveria dactylifera Echeveria nebularum Echeveria nodulosa, Aloes, Mamillaria Echeveria nodulosa Echeveria nuda Echeveria rosea Echeveria rosea Echeveria rosea Echeveria secunda Kalanchoe uniflora Mamillaria Mamillaria Mamillaria Opuntia Opuntia Opuntia Yucca lacandonica and Agave

Hi A family I would highly recommend for this type situation is Microsorum. Almost ideal is M. thailandicum. blue ,jade fern It not only tolerates low light it thrives.lol. In the proper conditions it becomes almost irridescent.taking on an almost turquoise color.Strap type leaves look like they have been polished . In higher light it becomes medium green higher still higher yellow green. Many of this family are Asian aquatics but in a humid atmosphere become terrestrial. Another plus for terrarium culture is that they remain under a foot in diameter. at least for me. I grow them in straight long fibered sphagnum . in a shadehouse though. All the Lycopodiums that I'm aware of are epiphytic. How large a terrarium are you doing?? I grow five types of Jewel orchids though slow growing can become quite a patch. lol I'm converting my 150 gallon aquarium located in the shadehouse into a terraium due to a persistant leak lol Thes e will go into it for sure. gary

Hi Aquatic ferns/ mosses would be you best choices . They require constant sources of water. most terrestrial ferns particularly the epiphytic ones you mention MUST dry out regularly Good luck gary

Hi there is a huge family of these epiphytic ferns the genus name is polypody. Look closely at where the fronds begin and you'll see a flesh fuzzy root. I tend to call the smaller ones squirrels foot and the larger bears foot They reproduce by airborne spore so can pop up anywhere Often see them growing on palms real pest in hanging orchid pots !!! gary