Pubescence is often poorly developed or absent in proximal florets of viviparous spikelets. 短柔毛是在胎生的小穗的下部的小花里的通常发育不良或无。
This is a variable species, usually with apparently awnless spikelets, where in fact a weakly developed awn is enclosed within the glumes. 这易变种，通常具表面上小穗，实际上，发育不良芒在在那些颖片内的内藏。
