抄録
1) No distinct border was observed between coleorhiza and scutellum at the resting stage, and coleorhiza fused with scutellum shortly above the lower part of scutellum. The border became clearly visible and fused diagonally with scutellum at the germination. 2) The border of coleorhiza of epiblast side was not clear in the resting stage, but it became distinct at the germination. 3) Rice had one empty space between seminal root and coleorhiza, while barley, wheat, oat and rye had 3 (usually) empty spaces and these spaces were detached from each other by the coleorhiza tissues. 4) From the results mentioned above and reported in the third and the fourth reports of this series, morphological features of coleorhiza were compared among rice, barley, wheat, oat and rye, and results were shown table 1.
