本文主要以共時的方言事實和地理分布為依據，配合歷史文獻中所見的記錄，藉由「茄子」與「蕃茄」這二種外來食用植物的名稱在粵東閩方言地區的地理分布，討論這二種食物名稱不同變體的歷史變化和其變化機制。論述海岸河川地形的語言傳播以及語言陸路式傳播和航運式傳播的競爭，顯現一個地區詞彙變化的不連續分布。

Through the distributions of two kinds of foreign food, ＂茄子＂ and ＂蕃茄＂ at Min Dialect regions at Eastern Guangdong, this paper tries to probe the historical changes and the mechanism of change of all these variants. The study is based on synchronic data collected at field and their distributions, together with facts found at literatures. With additional discussions of the propagation of languages of coastal areas and riversides as well as the competition of language propagation by land transportation and that by maritime transportation, it aims to reveal a non-continual distribution of lexical change.