This is formed by the swollen lowest rachilla internode and adnate lower glume.
2
雄蕊和心皮的数目偶尔也发生改变,在小穗轴的叶腋处偶尔也异位产生小花。
Occasionally, the number of stamens and carpels is altered and an ectopic floret occurs in the axil of the rachilla.
3
这与其小穗轴和浆片中的维管束发育不良、辅导系统不发达、浆片不易吸水与失水等原因有关。
It is because the vascular bundles in its rachilla and lodicules were undeveloped, the transport system was abnormal. and the lodicules absorbed and lost water difficultly.