Abstract: The papillae of rice lemma in Oryza meyeriana Baill. subsp. tuberculata Wu, Oryza officinalis Wall. ex Watt., Oryza rufipogon Griff. and Oryza sativa L. were studied with scanning microscope. The differences of the papilla characters among the species of the Oryza have been observed, in which there existed the most difference on lemma papillae between O. sativa and O. meyeriana subsp. tuberculata. The papilla characters of O. sativa were more similar with those of O. rufipogon. The similarity of the papilla characters among the species of the Oryza were compared with the method of characteristic number.

Key words: cultivated rice: lemma, papilla structure, wild rice, Oryza meyeriana subsp. tuberculata, Oryza officinalis, Oryza rufipogon, Oryza sativa

摘要： 用扫描电镜对原产中国的瘤粒野生稻（Oryza meyeriana Baill. subsp. tuberculata Wu），药用野生稻（Oryza officinalis Wall. ex Watt.），普通野生稻（Oryza rufipogon Griff. ）的外稃表面的显微结构与栽培稻（Oryza sativa L.）进行了比较研究。观察到栽培稻与瘤粒野生稻在一系列性状上差异最大，其次是药用野生稻，而最相似的是普通野生稻。应用性状数码的方法对种间的相似性作了比较。

关键词: 外稃, 乳突结构, 野生稻, 栽培稻