seeking Huperzia serrata source

[Eric J. Forbis]

Is anyone familiar with a source for _Huperzia serrata_, a Chinese club moss? 
I don't seem to be able to find it mentioned in most bryophyte texts, much 
less listed in catalogs. It's a traditional herbal remedy that has recently 
gained some empirical backing, and is usually used to treat Alzheimer's 
disease and memory problems.

Thank you,


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Eric Forbis      forb0004 at student.tc.umn.edu