Arisaema amurense is perhaps the most variable species within the entire genus. Given that it has a very wide distribution throughout North East China, Korea and Russia, this is not all that surprising.
Arisaema amurense is very closely related to Arisaema ovale. The latter occurs in Japan and does not have a continental distribution. Similarly, Arisaema amurense is not found in Japan.
This is generally a small species. In exceptional cases, the maximum height appears to be around 50cm, although many forms are less than this. Numerous clones are in cultivation and many make excellent and reliable garden plants, being perfectly hardy in a well drained location. A good sized clump can be achieved through offsets after a few years of cultivation.
The inflorescence emerges at the same time as the leaves and is generally green in colour, often with vertical white or pale lines. Sometimes these can be reddish maroon. The inside of the spathe can be more brightly coloured with darker horizontal bands. The spathe limb is relatively short and tends to be held mostly horizontal.
There are usually two leaves, each with up to five leaflets. Younger plants can show leaves with three leaflets, whilst older and more mature plants will have five. Some clones have very attractive serrated or undulated leaf margins.
Individuals are either male or female and never bisexual.
Sometimes plants can be seen for sale under the name ‘Arisaema robusta’. This is simply a large and vigorous clone of Arisaema amurense, and not a distinct species as is often claimed.
The tuber is subglobose and relatively small, reaching around 2.5 or 4cm in diameter. Sessile offsets or bulblets are produced in abundance on mature tubers.
Seeds and germination:
Seeds can be stored dry with no significant loss of viability.