Abstract
Though the coleoptile is typically a two-bundled structure, occasionally a higher number of strands occur. In this paper the author will show at least two cases on the origin of them. (1) First case : After originating from the lower strands simultaneously in like manner and going together, the normal and supplementary bundles are separated each other. (2) Second casse : The supplementary bundle originates isolately in the cortex of the coleoptilar base. Frequency of appearance of the supplementary bundle in the second case is larger than that in the first case. Hereafter in discussing the origin of the supplementary bundle of the coleoptile the two types may be distinguished.
