1.Seeds reniform, slightly compressed, rugulose, without protuberances.
种子肾形，稍压扁，微皱，没有突起。
2.Spikelets lanceolate; lower lemma slightly shorter than spikelet; upper lemma punctate-rugulose.
小穗披针形；更低的外稃稍短于小穗；上面外稃具点微皱。
3.Seeds numerous, brown, reniform, slightly compressed, rugulose.
种子多数，棕色，肾形，稍压扁，微皱。
4.upper lemma swollen, striate, transversely rugulose, apex acute.
使膨胀的上面外稃，具条纹，横向微皱，先端锐尖。
5.Leaves elliptic or oblong, lateral veins obscure adaxially, rugulose in dried state.
或长圆形的叶椭圆形，正面的侧脉不明显，微皱干燥时。
6.follicles dark blackish brown when dry, 0. 5-1. 5 cm in diam. , rugulose, oil glands inconspicuous, apex beaked.
蓇葖果干燥时深黑棕色，直径0.5-1.5厘米，微皱，油腺点不明显，先端具喙。