| 1 | The vascular tissue passes through the pulvinus into the petiole proper. | |
| 2 | The area between the upper part of the leaf sheath and the basal portion of the leaf blade contains several specialized organs, such as the laminar joint, auricle and ligule. | |
| 3 | This new species is unique in having pulvinate petioles, a feature not known in any other species of Begonia in China. |
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