【摘要】 描述了河南玉兰属Yulania Spach两新种:两型玉兰Y.dimorpha T.B.Zhao et Z.X.Chen,sp.nov.和信阳玉兰Y.xinyangensis T.B.Zhao,Z.X.Chen et H.T.Dai,sp.nov..两型玉兰形态特征是:叶2种类型,玉蕾2种类型.花2种类型:①单花花被片9枚,有萼、瓣之分,瓣状花被片先端具喙,边部明显波状起伏;②单花花被片9枚,花瓣状,先端无喙,边缘微波状起伏.信阳玉兰的形态特征是:叶宽倒卵圆状三角形,先端最宽,通常微凹,或具短尖头,有时2裂,或具3个短三角状尖头.玉蕾顶生,小,卵球状,或短柱状.花喇叭型,单花花被片6～9枚,匙形.更多还原

【Abstract】 Two new species of the genus Yulania Spach from Henan were described,which were Y.dimorpha T.B.Zhao et Z.X.Chen,sp.nov.and Y.xinyangensis T.B.Zhao,Z.X.Chen et D.H.Dai,sp.nov..1.The characteristics of Y.dimorpha:leaves and Yulania-alabastra were all 2 types.The flower were 2 types too:① One flower has 9 tepals,the distinguish were finded in petals and sepals,the apices had beaks,the edge was fluctuated obviously.② One flower has 9 petaloid tepals,the apices of the petaloid tepals without beak,the edge part was phaner-repand.2.The characteristics of Y.xinyangensis T.B.Zhao,Z.X.Chen et D.H.Dai.The leaves were obovate triangle,the apices was the widest,usually emarginated or with mucronation,sometimes 2 lobates or 3 short triangle acumen.The Yulania-alabastra were temtinal,small,ovoid or short colummnar.The flowers was flared.The single flower has 6~9 tepals,Spathulatae.更多还原