直立介蕨是假蹄盖蕨属的成员

对直立介蕨Dryoathyrium erectum (Z. R. Wang) W. M. Chu &; Z. R. Wang与介蕨属Dryoathyrium、假蹄盖蕨属Athyriopsis的叶、毛、孢子囊群和孢子的形态进行了比较研究。直立介蕨叶轴和羽轴上的沟槽不明显、具有单列细胞的节状毛、孢子囊群有双生一脉, 以及孢子的形态等特征与假蹄盖蕨属植物相似。结合叶绿体DNA trnL-F区序列分析结果, 所有形态及分子资料均表明该种植物应属于假蹄盖蕨属, 应恢复其原名直立假蹄盖蕨Athyriopsis erectum Z. R. Wang。

Dryoathyrium erectum is a member of the genus Athyriopsis

In order to determine the taxonomic relationship of Dryoathyrium erectum (Z. R. Wang) W. M. Chu & Z. R. Wang, characters of the fronds, hairiness, sori and spores in Dryoathyrium and Athyriopsis were comparatively investigated. The results have shown that D. erectum has unconspicuous grooves on the frondal rachis and costa, uniseriate articulate hairs on the plant and diplazioid sori. All these characters are present in the genus Athyriopsis but not in the genus Dryoathyrium. The spore morphology of D. erectum is more similar to that in Athyriopsis than in Dryoathyrium. Evidence from the chloroplast trnL-F sequences data also supports the inclusion of D. erectum in Athyriopsis. Therefore, D. erectum should be a member of Athyriopsis, and A. erectum Z. R. Wang is the correct name of this species.