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Supplied with shoot clumps induction medium (SCIM), immature inflorescence (together with adjacent node) of switchgrass could develop into multiple shoots.For this phenomenon, we did some microstructure analysis, and finally got conclusions as follows.After immature inflorescence cultured on SCIM about 7 days, both axillary bud at various levels and axillary buds of newly formed shoots stimulated by supplied hormones grew immediately without dormancy.