中国伞形科前胡属果实结构的系统学价值

The phylogenetic significance of fruit structures in Chinese Peucedanum of Apiaceae

本文深入研究了位于中国前胡属刺尖前胡组,多小苞片组,山亮蛇床组及近亮蛇床组的果实结构,结果显示前胡属果实多具单细胞毛状体.中脊及侧脊通常不明显,边脊形成翅.多数物种具小的伴生油管.油管分布在沟（1～4个）及结合面（2～14个）,一些物种具短的或小的油管.结合面与分果同宽,具两个相对的心皮柄.胚乳腹面多平直.中果皮有球状晶体.前胡属不同组的果实结构相似,此属应是一个较自然的类群,属内是否需要分组值得进一步研究.石防风的果实与其他物种不同,具厚的边翅和大的维管束,支持分子系统学将其从前胡属分离出去.

The fruit structures of the sections Eleganitia,Bracteolata,Oreoselinum,and Selinoides in the genus Peucedanum were deeply studied in the paper.The results show that fruits of the genus usually have single cel-lular trichome.The median and lateral ribs are usually not prominent,but marginal ribs form wings.The small rib duct occurs in many taxa.Vittae are present in the furrow (1-4)and commisure (2-14),and short and drowf vittae are observed in some species.The commisure is as wide as the mericarp width and with two opposite carpophores.The endosperm is often flat at the commissural side.The spherical crystals occur in the mesocarp.The fruit structures are similar in different sections and the Peucedanum should be a more natural group,and the further study is needed to know if the genus should be divided into sections.The fruits of Peu-cedanum terebinthaceum differ from the other taxa,which have thick marginal wings and large vascular bun-dles,and it is supported here that the molecular research moved the Peucedanum terebinthaceum out from the genus.