Thanks Dan. I have not tried to propagate from spores. It is much easier just to divide up the plants but I have not really done much of that either. Only with one species, S. underwoodii, in an experiment to see how the plant responded to different types of potting mixes as I tried to learn how to grow these babies. Several failures but I have found the right potting mix formula which I will be posting up here sometime this month, if not this week.
Unless you have a scree or rock garden in your yard these plants are not really for regular gardening. Also, though I believe they might survive our hard waters if they have excellent drainage, they need at the least reverse-osmosis water, or distilled, deionized or rain water.
Let me know how you fare with the key. It really requires that you know about the physical characteristics of the plant out front as well as where they come from. A major reference is at efloras.
http://www.efloras.org/florataxon.as...axon_id=302114