Pleurospermum uralense ("Okasamochi")

Japanese name: オオカサモチ （大傘持）
Scientific name: Pleurospermum uralense

[Overview]
A large perennial seen in grasslands from the mountains to the alpine zone, growing up to 1.5 m tall.
The stem is thick and juicy, and the upper branches are opposite or whorled.
The leaves are alternate and large, once- to three-times ternately pinnately compound, soft in texture, with the leaflets and final lobes cut pinnately.
Compound umbels at the stem tips and branch tips bear many small white 5-petaled flowers.
The inflorescence has bracts and bractlets, both drooping and usually pinnately cut.
The fruit is an ovate mericarp.

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