石杉属植物约100种，主要分布于热带与亚热带，温带也有。我国现知25种1变种，主产西南，其他地区也有少量分布。该属又可分为2组，即小杉兰组（Sect. Huperzia）和蛇足石杉组（Sect. Serratae）。石杉属部分植物还可供药用，如：蛇足石杉（Huperzia serrata (Thunb. ex Murray) Trev.）全草入药，有清热解毒、生肌止血、散瘀消肿的功效。
蛇足石杉 Huperzia serrata
石杉碱甲 Huperzine ; HupA ; Huperzia Serrate P.E ; HUP
石杉科 Huperziaceae ; Lycopodiaceae
四川石杉 Huperzia sutchueniana
石杉碱乙 Huperzine ; HupB ; HUP
石杉碱丙 Huperzine ; huperzinine
石杉碱 Huperzine ; Huperizne
皱边石杉 Huperzia crispata
石杉碱甲片 Huperzine A Tablets ; huperzine-A tablets
石杉碱甲胶囊 Huperzine A Capsules
It showed that the quantities, species and distribution of endophytis fungus varied with different parts of Huperzia serrata. The most of them were in stems and the least were in roots.
内生真菌在蛇足石杉的不同部位的数量、分布和种群上存在有差异,茎中最多,其次为叶片,根中最少。
参考来源 - 蛇足石杉内生真菌的分离及生物活性初步研究·2,447,543篇论文数据，部分数据来源于NoteExpress
结论：石杉碱甲对多梗死性痴呆有效。
CONCLUSION: Hupezine a has a therapeutic effect on multiple infarction dementia.
结论石杉碱甲片是治疗良性衰老性遗忘症的理想药物。
Conclusion Hup is an ideal drug for symptomatic treatment of patients with benign senescent forgetfulness.
目的：观察石杉碱甲治疗阿尔采末病(AD)的疗效和安全性。
AIM: To evaluate the clinical efficacy and safety of huperzine a in treating Alzheimer diseases (AD).
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