Arisaema sikokianum

Arisaema sikokianum

The name Arisaema was established in 1831 by German botanist and explorer Von Matius (1794-1868) and was based on three Himalayan species A. costatum, nepenthoides and speciosum which had previously been described and illustrated in 1828 by dutch born surgeon and botanist Nathaniel Wallich who placed them under the genus Arum.

Of course Arisaemas can be found in other regions of the northern hemisphere including the mountain areas of Asia as the Himalaya region, India, China and Japan, and there are two species originated from N. America.

Most arisaemas grow in humus rich soil in filtered light positions. Hardiness varies considerably among the species. Some can be grown in regions where winter temperatures drop to around below -10 Deg C. provided the soil is not water-logged. Tropical species need to be grown in frost free regions. Avoid exposing them to direct sunlight, particularly during the hotter times of the day.

We have a small collection of 9 of these very beautiful plants. Most have been grown from seed purchased from various sources. Of these 9 we can only really confirm the identity of 3; flavum, sikokianum and ringens. The others will need careful examination to confirm, or otherwise their identity. We make this point because references in relation to Arisaema are uniform. For example many texts still record that A. amurense can be found in Japan. However, in 1986 japanese botanist Murata revised the group of A. amurense and stated that this species is restricted to continental Asia including Korea, Russia and China and not found in Japan. The similar Japanese species is A. ovale.

We will continue to review our collection.

Habitat:
Japan

Description:
Introduced in 1938. This is a large and robust species, growing around 50cm in height, with two sea-green divided leaves that each look like three leaves and a large open pitcher-shaped inflorescence. The hood or lid of the spathe’s displays itself in a broad, fully open position revealing its chocolate-purple & verticle white inner striping, and  in the “cup” of the pitcher there arises a brightly snow-white spadix.

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Posted on

January 22, 2018