The 'Walking' Iris Blooms in Shilin Green Spaces

Taipei's Shilin District is currently showcasing the vibrant blooms of the "Walking Iris" (Orthosanthus multiflorus), a plant celebrated for its unique reproductive capabilities and delicate beauty. Found flourishing in areas like Lanya Park and Zhongcheng Park, this species, also known as "Blue Butterfly" or "Jade Butterfly," adds a splash of color and a subtle fragrance to the urban landscape.

The plant's common English name, "Walking Iris," aptly describes its fascinating method of propagation. As described by park officials, the plant develops young shoots at the tip of its sword-shaped leaves. As these plantlets grow heavier, they cause the leaf to bend, eventually touching the soil. Once contact is made, the plantlet roots itself, forming a new, independent plant. This remarkable process allows the iris to "walk" or spread across the ground, creating dense clusters of foliage.

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The sword-shaped leaves at the tip will produce flat, leaf-like flower stalks, and at the flowering nodes, plantlets will develop. As the plantlets grow heavier, the sword-shaped leaves will bend and touch the soil, and the plantlets will then root and grow into new plants. This reproductive expansion, as if it walks, is why the Brazilian Iris has the English name Walking Iris.

Each flower of the Walking Iris, while short-lived, is a spectacle. Blooming for only half a day to a full day, the flowers present a complex structure that can initially appear to have six petals. However, closer inspection reveals three outer, specialized bracts that spread outwards, and three inner, upright petals that are the true floral components, adorned with white stripes and a distinct blue-purple hue. The blooming season is expected to continue through May, with new buds consistently forming.

Originally from Brazil and southern Mexico, the Walking Iris has been cultivated in Taiwan for a long time due to its adaptability to the island's low-altitude climate. It is commonly found not only in parks but also along the sides of mountain trails, demonstrating its resilience and widespread presence. The Taipei City Parks and Street Lights Office encourages residents and visitors to appreciate these natural displays, which enhance the aesthetic appeal of Taipei's green spaces.

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The Brazilian Iris likes a semi-shaded environment with half sunlight. In Shilin and Tianmu, many large trees provide shade in Lanya Park and Zhongcheng Park, where they are cultivated, adding to the aesthetic effect.