Psilotum are primitive ferns that have been unchanged for hundreds of years. Two species nudum and complanatum. In Japan they have cultivated many other forms (species?) from the Edo Period (1603-1867) until now. There are short stubby forms (species?) and there are some that have clumpy tips. Some that are variegated and others that are straight growing. At one time there was said to be more them 200 forms (species?) in cultivation. I like to grow them like bonsai trees. They like to have good drainage and bright light. Contact me if you are interested in starting your collection...