1·Lower glume of sessile spikelet pitted between veins.
在脉之间具洼点的无梗小穗的更低的颖片。
2·The length of the lower glume is very variable, even within a single raceme.
更低的颖片的长度非常易变，即使在一单个的总状花序内。
3·Compared with Liuqianxin A, 731A has a shorter period of flowering days, a smaller angle of glume opening and a longer glume opening time.
与六千辛A相比，731A开花持续天数较短，开颖角度较小，柱头外露率低，开闭时间略长。
4·Culms up to 1. 5 m; upper glume of sessile spikelet thinly pilose.
秆可达1。5米；稀疏的无梗小穗的上面颖片具柔毛。
1·Pedicels of spikelet pair equal, as long as rachis internode; upper glume with 0. 5-1 mm mucro.
小穗对的花梗等于，倍于轴节间；上面颖片具0。5 - 1毫米短尖头。