苏铁Cycas revoluta两种特异形态特征

摘要

Two kinds of morphological anomalies inCycas revoluta were observed in Fuzhou, Fujian Province. The first was that a sucking bud seedling had grown 5 pieces of abnormal leaflets, one piece with a bifurcated midrib was longer than normal leaflets, and another had a double-pieced base. And the second was that a male cone had a rosette tip, as if there were a female cone on its top. These kinds of anomaly would provide some new basic data for cycad systematics and evolution.%在开展苏铁Cycas revoluta形态特征观测中，发现一株苏铁根蘖苗有5片羽片生长异常，其中一片比其他正常羽片长且中脉出现分叉(即一羽多脉现象)，另外4片基部两两贴生。另一株苏铁的小孢子叶球生长奇特，其顶部为莲座状，形似大孢子叶球。这两种异常现象为苏铁类植物的系统分类与演化研究提供了新资料。