The vascular bundles of the primary structure in stem are ring arranged, and the node is unilacunar and 3-traced, which is from three vascular bundles or one vascular bundle.
茎的初生结构中多个维管束排列成环状，节部为单隙三迹，叶迹分别来自于3条维管束或同一条维管束。
The results showed that: the number of primary branches, secondary branches, and spikelets were closely associated with the number of vascular bundle.
结果表明，维管束数目与一、二次枝梗数及颖花数有密切关系。
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