【摘要】 报道了安徽蓼属Polygonum一新变种——圆基愉悦蓼P.jucundumvar.rotundum Z.Z.Zhou&Q.Y.Sun。新变种与原变种的区别在于:叶条状披针形,长4.5–9.0cm,宽0.5–0.9cm,基部圆形,近无柄;茎粗1.5–2.0mm。新变种在叶形上还与圆基长鬃蓼P.longisetum var.rotundatum A.J.Li相近,但其植株明显高,可达160cm,茎基部20–26节上生多数不定根,不定根长达10–16cm;花序的花梗长4–5mm,远伸出苞片外,易于区别。对新变种及其近缘种的花粉形态、花被片和瘦果微形态特征进行了扫描电镜比较观察。更多还原

【Abstract】 Polygonum jucundum var. rotundum Z. Z. Zhou & Q. Y. Sun, a new variety of Polygonum (Polygonaceae) from Shengjin Lake, southeastern Anhui, China, is described and illustrated. The variety differs from P. jucundum var. jucundum Meisn. by having leaf blade linear-lanceolate, 4.5–9.0×0.5–0.9 cm, base rounded, petiole nearly absent, and stems 1.5–2.0 mm in diam. The new variety is similar to P. longisetum var. rotundatum A. J. Li in leaf shape, but differs by plants taller, up to 160 cm, rooting at 20–26 base nodes, adventitious roots 10–16 cm long, pedicels longer than bracts, 4–5 mm long. The pollen morphology, tepal and fruit microcharacteristics of the new variety and its relatives were comparatively observed under the scanning electron microscope (SEM).更多还原