臺灣博碩士論文加值系統

植物葉脈是植物體穩定的特徵，蕨類植物的脈相有游離脈、網狀脈和複合型脈型，其演化方向是由游離脈朝向網狀脈。
在此次研究中，觀察了 14 屬 53 種台灣產水龍骨科植物，水龍骨科葉脈主要分為兩種形式，一種是具有網眼，末端為游離小脈，一種是網眼為主。依葉脈分叉生長的型式，可分為ｒ型生長、Ｙ型生長與Ｔ型生長。ｒ型主要是石葦屬為主，Ｙ型以檞蕨屬、連珠蕨屬、水龍屬、萊蕨屬、劍蕨屬為主，Ｔ型主要以肢節蕨屬、茀蕨屬、伏石蕨屬、瓦葦屬、線蕨屬、星蕨屬、擬茀蕨屬、扇蕨為主。
水龍骨科各屬葉脈形式從簡單的游離脈加網脈到複雜的網脈，各屬的種類有其共通的特徵，其葉脈形式可歸納成三類七種。植物葉脈脈相研究或可提供探討演化路徑的線索之一。

Leaf vein patterns of ferns are highly stable at genus and family level. The vein patterns include free vein, reticulate vein and mixed type of above two. The evolutionary direction of the fern venation is from free veins toward further dividing into anastomosing venation.
In this study, observations on the venation were made for 53 species of Taiwan Polypodiaceae ferns. Two basic patterns were found : mixed and reticulate. The growth of the venation can be divided into three types : r type, Y type and T type. The r type was found in Pyrrosia ; the Y type was found in Drynaria, Aglaomorpha, Polypodium, Leptochilus and Loxogramme ; and the T type was found in Arthromeris, Selliguea, Lemmaphyllum, Lepisorus, Colysis, Microsorum, Phymatosorum and Neocheiropteris.
The leaf venation patterns of venation in Polypodiaceae can be divided into seven modes in three lines, with each genus has its own common characteristies. This study of vein pattern demonostrates its important role in the investigation of fern evolution.

中文摘要............................................Ⅰ
英文摘要............................................Ⅱ
目錄............................................Ⅲ
圖目錄............................................Ⅳ
表目錄............................................Ⅴ
壹、前言............................................1
貳、材料與方法............................................3
參、結果與討論：............................................3
(一) 各屬各種葉脈形式探討..........................4
(二) 屬上階層的比較................................10
(三) 水龍骨科各屬演化途徑..........................12
肆、引用文獻............................................14

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