| 英文摘要 |
Radula is a genus of minute leafy hepaticae. It is likely to be overlooked or confused with other closely resemble genera such as Frullania, Porella and Lejeunea. But a close study under the microscope will readily reveal the fact that it differs from all these genera in its lack of underleaves. Its incubous leaves consist of two lobes, the broadly rounded dorsal lobe and the smaller ventral lobe which is usually less than half the size of the dorsal one. The rhizoids are often born on the ventral lobe and not directly upon the stem. Radula usually grows in patches, mainly on wet rock surfaces or tree trunks of some shade. |
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