越南枫杨Pterocarya tonkinensis (Franch) Dode
越南枫杨Pterocarya tonkinensis (Franch) Dode
3.越南枫杨
Pterocarya tonkinensis.(Franch.) Dode in Bull. Soc. Dendr. France70: 67. 1929. ——P. stenoptera C. DC. var. tonkinensis Franch. in Journ. Bot. Morot. 318. 1898.
乔木，高约15-30米，胸径可达1米；枝无毛，有稀疏皮孔。偶数或稀奇数羽状复叶，叶轴无翅；小叶常4-6对，卵形或矩圆状卵形，长达10-17厘米，宽达4-7厘米，基部歪斜，圆形或阔楔形，顶端急尖至渐尖，上面无毛，下面在侧脉腋内有簇毛，边缘有细锯齿，侧脉13-16对。果序长13-30厘米，坚果菱形，长约7毫米，顶端有宿存的花被片及花柱，有2狭窄翅，翅长约1.5-1.7厘米。花期3月，果期5-6月。
产于云南东南部。分布于越南、。模式标本采自越南北部。生于海拔180-1100米的杞溪涧、水沟边或潮湿地方。树皮和枝皮纤维可作造纸原料，也可经加工处理后取麻制绳索和麻袋。
本种和枫杨极相近，其不同是本种叶轴无翼，小叶较大，形状较宽阔，顶端急尖至渐尖；而枫杨的叶轴有翼，小叶较小，形状较窄，顶端钝圆至急尖。该二种的上述区别，在我国云南南部和东南部都存在着中间的过渡类型。
《Flora of China》 Vol. 4 (1999)
Pterocarya tonkinensis (Franchet) Dode
越南枫杨 yue nan feng yang
Pterocarya stenoptera C. de Candolle var. tonkinensis Franchet, J. Bot. (Morot) 12: 318. 1898.
Trees to 30 m tall. Leaves even-pinnate, rarely odd-pinnate, 18 cm or more; petiole 4.5-7 cm, glabrescent; rachis wingless, sometimes ridged or sulcate, pubescent or glabrescent; leaflets 6-14, sessile, ovate or elliptic-ovate, 9-17 × 3-7 cm, abaxially glabrous except for hairs along midvein and secondary veins, base oblique, rounded or broadly cuneate, apex acute to acuminate. Fruiting spike 13-30 cm. Nutlets rhomboid, 6-7 mm, glabrous; wings linear, 1-1.7 cm × 2-6 mm. Fl. Mar, fr. May-Oct.
Wet areas along mountain streams; 200-1200 m. S Yunnan [Laos, Vietnam]
Shares many features with Pterocarya stenoptera, but lacks wings on the rachis and has a more southerly distribution with earlier flowering and fruiting. Transitional forms occur where the ranges of two species overlap.
别名：妹宗;郭埋耸;滇桂枫杨;短翅枫杨;麻柳树;水柳树;东京枫杨;小鸡树;东京风杨;麻柳;
科名：胡桃科 Juglandaceae
属名：枫杨属 Pterocarya
3.越南枫杨
Pterocarya tonkinensis.(Franch.) Dode in Bull. Soc. Dendr. France70: 67. 1929. ——P. stenoptera C. DC. var. tonkinensis Franch. in Journ. Bot. Morot. 318. 1898.
乔木，高约15-30米，胸径可达1米；枝无毛，有稀疏皮孔。偶数或稀奇数羽状复叶，叶轴无翅；小叶常4-6对，卵形或矩圆状卵形，长达10-17厘米，宽达4-7厘米，基部歪斜，圆形或阔楔形，顶端急尖至渐尖，上面无毛，下面在侧脉腋内有簇毛，边缘有细锯齿，侧脉13-16对。果序长13-30厘米，坚果菱形，长约7毫米，顶端有宿存的花被片及花柱，有2狭窄翅，翅长约1.5-1.7厘米。花期3月，果期5-6月。
产于云南东南部。分布于越南、。模式标本采自越南北部。生于海拔180-1100米的杞溪涧、水沟边或潮湿地方。树皮和枝皮纤维可作造纸原料，也可经加工处理后取麻制绳索和麻袋。
本种和枫杨极相近，其不同是本种叶轴无翼，小叶较大，形状较宽阔，顶端急尖至渐尖；而枫杨的叶轴有翼，小叶较小，形状较窄，顶端钝圆至急尖。该二种的上述区别，在我国云南南部和东南部都存在着中间的过渡类型。
《Flora of China》 Vol. 4 (1999)
Pterocarya tonkinensis (Franchet) Dode
越南枫杨 yue nan feng yang
Pterocarya stenoptera C. de Candolle var. tonkinensis Franchet, J. Bot. (Morot) 12: 318. 1898.
Trees to 30 m tall. Leaves even-pinnate, rarely odd-pinnate, 18 cm or more; petiole 4.5-7 cm, glabrescent; rachis wingless, sometimes ridged or sulcate, pubescent or glabrescent; leaflets 6-14, sessile, ovate or elliptic-ovate, 9-17 × 3-7 cm, abaxially glabrous except for hairs along midvein and secondary veins, base oblique, rounded or broadly cuneate, apex acute to acuminate. Fruiting spike 13-30 cm. Nutlets rhomboid, 6-7 mm, glabrous; wings linear, 1-1.7 cm × 2-6 mm. Fl. Mar, fr. May-Oct.
Wet areas along mountain streams; 200-1200 m. S Yunnan [Laos, Vietnam]
Shares many features with Pterocarya stenoptera, but lacks wings on the rachis and has a more southerly distribution with earlier flowering and fruiting. Transitional forms occur where the ranges of two species overlap.
