Nanbusou - Nanbusou

Japanese: ナンブソウ - なんぶそう

A delicate perennial herb of the Berberidaceae family (illustration). It was named Nambusou because it was first collected in the southern part of Iwate Prefecture. The underground stem is thin. It has a single basal leaf with three leaflets, the central leaflet of which is diamond-ovate and the other two leaflets are distorted triangles. Many flowers grow on a spike. The flower has only 7-12 stamens and one pistil, and has no sepals or petals. The ovary contains one ovule. The fruit does not dehisce and contains one seed. It is distributed in the Tohoku region and Hokkaido in Japan, and has also been reported from North Korea.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

繊細なメギ科の多年草（イラスト）。ナンブソウという名は，岩手県の南部地方で最初に採集されたことによる。地中を走る地下茎は細い。葉は1枚で根生し，3小葉からなり，中央小葉はひし形状卵形，左右両小葉はゆがんだ三角形。穂状花序にたくさんの花がつく。花は7～12本のおしべと1本のめしべだけからなり，萼片も花弁もない。子房には1個の胚珠がある。果実は裂開せず，中に1個の種子がある。日本では，東北地方，北海道に分布し，他に北朝鮮からも報告がある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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