石松類(Lycophyte)及蕨類植物(Monilophyte)是維管束植物中以孢子為繁殖主體的兩大類群，也是森林中重要的草本植被組成元素。溪頭營林區位處南投中海拔山區，以嶺頭山及鳳凰山脈為界，氣候溫暖且潮濕多雨，甚適合石松類及蕨類植物生長其中。本研究於2013年1月至2014年2月間針對溪頭營林區進行石松類及蕨類植物之資源調查，調查方式以步道沿線記錄及設立樣木攀樹調查等方式進行。本研究目前根據步道沿線調查及架設樣木攀樹等方式共記錄得石松類植物2科3屬13種及蕨類植物27科68屬186種，於闊葉樹天然林所調查得之物種數較人工林為多，石松類植物以卷柏科所調查得物種數最多，蕨類植物則以水龍骨科植物囊括之類群最豐。本研究調查得之石松類及蕨類植中共199種，包含12種珍稀植物，其中，灰姬蕨為近年於臺灣中部地區新記錄之物種，野外族群甚小。本調查研究之結果除對本區石松類及蕨類物種之數量及分布有進一步瞭解外，更期能提供相關資料予其他研究參考及增益教學資源之內容。

Lycophytes and Monilophytes are two major vascular plants reproduced with spore and also important components of herbal society in the forest. Located in the middle elevation mountain and bounded by Mt. Lingtou and Mt. Fenhuang, Xitou tract has various Lycophytes and Monilophytes due to its warm and wet environment. The research was carried out in Xitou tract during January 2013 to February 2014 and investigated species along the trail as well as tree climbing. The results have found two families, 3 genera, 13 Lycophytes and 27 families, 68 genera, 186 Monilophytes. Selaginellaceae and Polypodiaceae are major components of Lycophytes and Monilophytes respectively. Moreover, twelve rare species are found in which Hypolepis pallida Hook is newly recorded species in Nantou. The investigation provides an understanding of Lycophytes and Monilophytes distribution in this area and references for researching and teaching.