纳罗克非洲狗尾草小花开放顺序通常从中上部向基部逐渐开放，最上部小花最后开放；一日开花高峰在清晨３～４时，单个花序开放持续时间２６～５７ｄ，平均４２．５ｄ；逐日开花高峰出现在开花第１０～１５ｄ；前２５ｄ开花数占总数的９０％；阴雨天将严重影响小花开放。 Narrows genus foxtail flower opening order is usually gradually opened to the base from the upper part of the uppermost floret finally open; peak flowering in the early morning 3 to 4, the single inflorescences open duration of 26 ~ 57d, an average of 42.5d; peak flowering days Appeared in flowering 10 ~ 15d; the first 25d flowering number accounted for 90% of the total; rainy days will seriously affect the opening of small flowers.