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Arisaema thunbergii ssp. urashima

Arisaema thunbergii ssp. urashimais, by Robert Pavlis

Arisaema thunbergii ssp. urashimais, by Robert Pavlis

Arisaema thunbergii ssp. urashima is a great aroid that adds some excitement to the garden. Known as the dominatrix jack-in-the-pulpit, it appears in late spring and is gone by late summer. Its special feature is a long, dark purple, whip-like spadix that can reach 45 cm long, in true dominatrix fashion.

 

Arisaema thunbergii ssp. urashima, by Robert Pavlis

Arisaema thunbergii ssp. urashima, by Robert Pavlis

Unlike many of its cousins, this denizen of the woods is easy to grow. Over time it makes offshoots that can be separated from the parent plant. It can also be grown from seed but may take 3-5 years to flower.

Fertilized flowers will produce red berries that mature in fall after the leaves have faded. All parts of the plant contain calcium oxalate and are poisonous.

Closeup of Arisaema thunbergii ssp. urashima by Robert Pavlis

Closeup of Arisaema thunbergii ssp. urashima by Robert Pavlis

The subspecies urashima is similar to the species, but is shorter growing to just 45 cm tall, and has 11-15 broad leaflets instead of 9-17 narrow ones.

Arisaema thunbergii ssp. urashima top view, by Robert Pavlis

Arisaema thunbergii ssp. urashima top view, by Robert Pavlis

 

Arisaema thunbergii ssp. urashima spadix closeup, by Robert Pavlis

Arisaema thunbergii ssp. urashima spadix closeup, by Robert Pavlis

Arisaema thunbergii ssp. urashima

 (air-uh-see-muh  thun-BERG-ee-eye)

Life Cycle: perennial/tuber

Height: 45cm (18in)

Bloom Time: late spring

Natural Range: Japan

Habitat: woodlands

Synonyms:  Arisaema urashima, Arisaema thnbergii, Flagellarisaema urashima,

Cultivation of Arisaema thunbergii ssp. urashima

Light: part shade to shade

Soil: humus-rich, well drained

Water: medium to wet

USDA Hardiness Zone: 5 – 9

Propagation: seed, division

Robert Pavlis
Editor of GardenFundamentals.com
I live in southern Ontario, Canada, zone 5 and have been gardening a long time. Besides writing and speaking about gardening, I own and operate a 6 acre private garden called Aspen Grove Gardens which now has over 3,000 perennials, grasses, shrubs and trees. Yes--I am a plantaholic!

I hope you find Garden Fundamentals an educational site that helps you understand your garden better.

2 Responses to 'Arisaema thunbergii ssp. urashima'

  1. Janice kapur says:

    Do you have a source to buy this plant?

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