摘 要 ：报道了贵州西部竹亚科箭竹属一新种，它被命名为威宁箭竹（Fargesia weiningensis Yi et L.Yang）。这个新种近似秦岭箭竹（F.qinlingensis Yi et J.X.Shao，但秆高达6 m，髓呈锯屑状；秆芽仅边缘具短纤毛；枝条较粗，直径达3 mm；箨鞘背面刺毛较密，小横脉不发育，箨舌繸毛长达1.5 cm，箨片常内卷，全部外翻；叶鞘纵脉间无小横脉，上部纵脊明显，叶片较大，长达15.5 cm，宽达1.5 cm，易于区别。
Abstract:A new species of the genus Fargesia Franch. emend. Yi of Bambusoideae comes from Western Guizhou Province of China was described in this article. It is Fargesia weiningensis Yi et L. Yang. The new species is similar to F.qinlingensis Yi et J. X. Shao, but its culms are up to 6 m high, medullas of crumbs, wide branch up to 3 mm in diam., culm sheaths on the back with dense bristle, without horizontal nerves, fimbria of ligule up to the length of 1.5 cm, blade of sheath reflexed and involution, leaf sheath without horizontal nerves, with ridge on the top, leaf blade bigger, up to the length of 15.5 cm and the width of 1.5 cm.