中文摘要
沙里仙溪為陳有蘭溪上游主要支流，整個集水區位於台灣中部南投縣境內，海拔1200m至3528m之間。植群調查以玉山國家公園內，台灣大學實驗林第32林班至35林班之林班界為研究範圍，面積為2119公頃。本研究設置樣區42個，並記錄其環境因子，調查所得之樣區資料利用降趨對應分析及矩陣群團分析之結果，配合列表比較法，將本區之植群分為15種林型，分別為1).台灣冷杉林型；2).台灣鐵杉林型；3).台灣二葉松林型；4).台灣赤楊─紅毛杜鵑林型；5).台灣雲杉林型；6).紅檜林型；7).褐毛柳林型；8).台灣赤楊─裡白蔥木林型；9).長尾柯─西施花林型；10).短尾葉石櫟林型；11).化香樹─阿里山千金榆林型；12).威氏帝杉─圓果青剛櫟林型；13).瓊楠─台灣山香圓林型；14).台灣赤楊─長梗紫苧麻林型；及15).台灣胡桃林型，影響植群型分化之主要因子為海拔高度。
英文摘要
Salihsian River is a major tributary to the upper Chenyoulan River in Nantou County, Central Taiwan, with the elevations ranging from 1200 to 3528 meters. The study area was 2119 hectares, covering the 32nd to the 35th Compartments of the National Taiwan University Experimental Forest in Yushan National Park. Vegetations in 42 plots were sampled and their environmental data were collected. They were analyzed by the detrended correspondence analysis, matrix cluster analysis and tabular comparison. 15 forest types have recognized：
(1) Abies kawakamii type,
(2) Tsuga chinensis type,
(3) Pinus taiwanensis type,
(4) Alnus formosana-Rhododendron rubropilosum type,
(5) Picea morrisonicola type,
(6) Chamaecyparis formosensis type,
(7) Salix fulvopubescens type,
(8) Alnus formosana-Aralia bipinnata type,
(9) Castanopsis carlesii-Rhododendron ellipticum type,
(10) Pasania brevicaudata type,
(11) Platycarya strobilacea-Carpinus kawakamii type,
(12) Pseudotsuga wilsoniana-Cyclobalanopsis globosa type,
(13) Beilschmiedia erythrophloia-Turpinia formosana type,
(14) Alnus formosana-Villebrunea pedunculata type, and
(15) Juglans cathayensis type. One of the major factors affecting the differentiation of the vegetation types was elevation.
