云南发现4翅果元宝槭

4-winged-fruit Acer truncatum in Yunnan Province

文献记载槭树科植物具2心皮和2翅果实。对云南晋宁县元宝槭人工林进行连续3年的调查,发现有4翅果,并且有30%的植株同时开4、3和2心皮的花,发育成4、3和2翅的果实;同株的4、3和2翅的果实在形态、果长、果宽、果厚、种子特征等几方面没有实质性变异。

All papers described the pistil of Aceraceae have 2 carpels and the fruit have 2 winged schizocarpic fruits （samaras）. From 2005 to 2007, the population ofAcer truncatum was investigated in Yunnan province, as weU as the flowers and fruits were observed and described. The results showed that 30% individuals have 4-, 3-, and 2-carpel-pistil flower within the same individual, subsequently developed into 4-, 3- and 2-winged-fruit. Within the same tree, there was no substantial variation among the samaras of 4-, 3- and 2-winged-fruit in the aspects of shape, length, width, thickness, and seeds.