Hi
Do you have trouble getting them to root?? One of the things I like about selaginellas is the ease of care. I have to stick with the tropicals and though I do get them to grow as a yard plant not the beauty of potted ones.
I use them extensively as underplantings for orchids as they never become invasive like most other ferns and relatives. gary

Gary,
Tropical species are probably not all that much different than the temperate species in ease of propagation. However they are in two different sections: most temperate species in Tetragonostachys and almost all tropical species in Stachygynandrum. The basic difference is that the "Tetras" can handle drought and have leaves that spiral around the stem while the "Stachy" really need moisture and humidity to do well and have flat stems with leaves ranked along the stem edges.
If well grown both types can prove to be spreading. While I am currently growing one species of Stachygynandrum native to North America, S. apoda, outside with the Tetragonostachys species, I would not expect most os the Stachygytnandrum species to do well outside in North America except in areas where humidity is constant snd sufficient to allow growth. Some are naturalized in the southeast USA with S. kraussiana surviving as dumped plants in two reported locations in northern California.
I believe there are only 2 species of the Tetragonostachys in Florida and both are probably endangered to nearly extinct. I would hope an effort to master cultivation of these species is being undertaken and if not should be.

If you examine the images the plant subject D has rhizoids evident along the stem. If the propgation is healthy and has several of these rhizoids evident then if the media is acceptable the plants should root readily.

I guess I need to find the time to work up some reports on the Stachygynandrum species I am growing beside what I have already posted at Photobucket.

Here is a link that might be useful: To access the 3 Stachygynandrum species use the menu on the left side under Albums

Hi
I grow 3 species S. uncinta,the red one forgot the latin name and matinsii. None of which are native I'm sure . Also grow a type of moss that looks ver similar but was identified as Dicranum by the vendor ,seemms to be epiphytic at least for me. I believe it came from Panama.
I gave up telling them apart they are sooo variable by color form and habit by where they are growing and time of year . I have enough trouble with orchid names .
Good luck with your project . Will check out the family for natives gary

Hi Gary,
Here is a link that has maps of all the species found in North America, excluding Mexico. It includes both natives and introduced species.

Here is a link that might be useful: USDA-Selaginella in the USA