Data from: Dianyuea gen. nov. (Salicaceae: Scyphostegioideae) from southwestern China

Dianyuea C. Shang, S. Liao & Z. X. Zhang, a new monotypic genus of Salicaceae based on Flacourtia turbinata H. J. Dong & H. Peng, is described and illustrated. Morphologically, Dianyuea differs from Flacourtia Comm. ex L'Hér. by having six connate stamens, basal placentation and lobed seed appendages. All those features indicate that Dianyuea is allied with Scyphostegia Stapf. A molecular phylogenetic analysis using plastid trnL-F, matK, and rbcL sequence data for representatives of 16 genera in Salicaceae s.l. shows that Dianyuea is sister to Scyphostegia. The new combination Dianyuea turbinata (H. J. Dong & H. Peng) C. Shang, S. Liao & Z. X. Zhang is proposed.

滇越木属（Dianyuea C. Shang, S. Liao & Z. X. Zhang）为基于陀螺果刺篱木（Flacourtia turbinata H. J. Dong & H. Peng）建立的杨柳科（Salicaceae）单型新属，本文对其进行了详细的形态描述与图解。形态学上，滇越木属与刺篱木属（Flacourtia Comm. ex L'Hér.）的区别在于其具有6枚合生雄蕊、基生胎座以及具裂片的种子附属物。上述形态特征均表明滇越木属与球萼树属（Scyphostegia Stapf）具有密切的亲缘关系。本研究选取广义杨柳科（Salicaceae s.l.）16个属的代表类群，利用其质体基因组trnL-F、matK及rbcL序列数据开展分子系统发育分析，结果显示滇越木属与球萼树属互为姐妹群。本文正式提出该新组合：陀螺果滇越木（*Dianyuea turbinata* (H. J. Dong & H. Peng) C. Shang, S. Liao & Z. X. Zhang）。