球柱草属（学名：Bulbostylis）是莎草科下的一个属，为一年生、纤细草本植物。该属共有100种，分布于温带地区。

Bulbostylis is a genus of plants in the sedge family. They are sometimes called hairsedges. There are over 100 species of these clump-forming plants of dry grasslands and warm and tropical savannas worldwide. They have solid, rounded, grooved stems and long, thin basal leaves. They bear spikelets of flowers.