Aconitum japonicum subsp. maritimum var. iyariense ("Iyaritorikabuto")

Japanese name: イヤリトリカブト （居谷里鳥兜）
Scientific name: Aconitum japonicum subsp. maritimum var. iyariense

[Overview]
A monkshood (Aconitum) found in northern Nagano.
A pseudo-annual that grows in wetlands and along streams.
The stem reaches as much as 3 m long, and the upper part becomes vine-like.
There are basal leaves and stem leaves, and the basal leaves and the lower stem leaves have withered by flowering time.
The stem leaves are alternate and deeply 3-lobed.
A corymb-like inflorescence bears many blue-purple flowers.
The 5 sepals are petal-like, and the upper one is shaped like a helmet.
The petals are inside the helmet and have a slender spur.
The stamens are hairy.
The fruit is a follicle.

[Notes]
The Japanese name comes from the Iyari Wetland in Nagano, where it was first collected.

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