Why is the yellow fan iris also called Yellow Walking Iris in English? Because after flowering, the yellow flower in the sheath will grow small plantlets. This phenomenon is called "viviparous phenomenon" in botany. These plantlets would grow and the weight of the growing plantlets would make the flower stalk bow down until it touched the ground and the plantlets took root.
The “walking” plantlet would end up taking root some distance away from the mother plant (in some cases, it may have a significant impact on its survival).
為什麼英文裡，黃扇鳶尾又叫做 Yellow Walking Iris（黃色會走路的鳶尾）呢?因為花鞘內的黃花開完後會長出小苗，這種現象在植物學上稱為「胎生現象」。這些小苗將生長，並且生長中的幼苗的重量會使花莖向下彎曲，直到花莖接觸地面並且幼苗生根為止。
A plantlet grows on the flower stalk. It is not like its sisters being picked and planted in the soil or water; on the contrary, I let it stay there. One year has passed and it seems to be a little malnourished. I don’t want to change it for the time being,
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