This species is closely related to Aconitum carmichaelii and is considered to be part of that species according to some botanists.
The genus Aconitum worldwide is notorious for complex patterns of morphologic intergradation that blur the lines between taxa. Aconites from different regions may be morphologically distinct but connected by a series of intermediate races[]. There have been huge differences of opinion between botanists as to how to define a species in this genus, with the Flora of N. America recognizing around 100 species worlwide[], whilst the Flora of China recognizes 211 species in China alone and around 400 species worldwide[]. We are following the proposed treatment in the 'World Checklist of Selected Plant Families', which is still under review, but currently (2016) recognizes about 320 distinct species (391 including hybrids and infraspecific forms) and over 1,000 synonyms[].

Common Name:

General Information

Aconitum maximum is a herbaceous perennial plant with an erect, strong stem up to 200cm tall[]. The stem grows from a biennial tuberous root that produces a new tuber each year, the old tuber dying after the plant flowers[].
The plant is sometimes harvested from the wild for local use as an insecticide or parasiticide.

Known Hazards

The whole plant is highly toxic - the root has been found to cause acute poisoning[].
The aconites have been of interest since ancient times because they contain diterpene alkaloids that range from relatively nontoxic to deadly poisonous. In various parts of the world they have been used medicinally and as a source of poisons throughout history. The use of Aconitum alkaloids in modern Western medicine was largely discontinued by the late 1930's and early 1940's, though the roots are still widely used in traditional medicine, especially in Asia[, ].

Botanical References

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Range

North-western N. America - Alaska, through northern Asia to Sakhalin. China, Japan.

Habitat

Sub-alpine meadows and thickets, Aleutian Islands to S.W. Alaska. Meadows, thickets, and forests from sea level to 300 metres[]. Birch groves and shrub thickets on the slopes of river terraces in Kamchatka[].

Properties

Other Uses Rating
Habit	Perennial
Height	0.20 m
Pollinators	Bees
Cultivation Status	Wild

Cultivation Details

Thrives in most soils and in the light shade of trees[]. Grows well in heavy clay soils. Prefers a moist soil in sun or semi-shade[]. Prefers a calcareous soil.
Grows well in open woodlands[, ].
Members of this genus seem to be immune to the predations of rabbits and deer[].
A greedy plant, inhibiting the growth of nearby species, especially legumes[].

Edible Uses

None known

Medicinal

None known

Other Uses

The seed is used as a parasiticide[]. It is used as an insecticide[].

Propagation

Seed - best sown as soon as it is ripe in a cold frame[]. The seed can be stratified and sown in spring but will then be slow to germinate[]. When large enough to handle, prick the seedlings out into individual pots and grow them on in a cold frame for their first winter. Plant them out in late spring or early summer.
Division - best done in spring but it can also be done in autumn[, ]. Another report says that division is best carried out in the autumn or late winter because the plants come into growth very early in the year[].