Alphabetical Plant Listing

Arisaema thunbergii subsp. urashima (Japanese Cobra Lily)

Japanese Cobra Lily, Dominatrix Jack-in-the-Pulpit


Arisaema thunbergii subsp. urashima (Japanese Cobra Lily) is a showy tuberous perennial boasting a long, curious, maroon-hooded spathe enclosing a cylindrical, maroon spadix with a long, whip-like tail that can reach 18 in. (45 cm). Blooming in late spring to early summer, the blossoms emerge from the ground near the base of the leaf stem and are topped by a large, solitary horizontal leaf divided into 11-15 narrowly lance-shaped, dark green leaflets. Fertilized flowers will produce striking red berries that mature in mid to late summer after the leaves have faded. All parts of the plant contain calcium oxalate and are poisonous. A most ravishing plant for the woodland garden, it is easy to grow and requires very little care. The entire plant contains crystals of calcium oxalate and is poisonous.

  • Grows up to 1-2 ft. tall and wide (30-60 cm).
  • Easily grown in fertile, humus-rich, medium to wet soils in partial shade to full shade.
  • Best left undisturbed in the shady woodland garden, wild garden or native plant garden. Plant in groups of a dozen or more.
  • Virtually disease and pest free.
  • Propagate by root division or seed. Seedlings need three or more years of growth before they become large enough to flower.
  • Native to Japan

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Requirements

Hardiness 5 – 9
Plant Type Bulbs, Perennials
Plant Family Arisaema - Jack in the Pulpit
Exposure Partial Sun, Shade
Season of Interest Spring (Mid,Late)
Summer (Early,Mid,Late)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Tolerance Wet Soil
Attracts Birds
Garden Styles Informal and Cottage, Prairie and Meadow

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 5 – 9
Plant Type Bulbs, Perennials
Plant Family Arisaema - Jack in the Pulpit
Exposure Partial Sun, Shade
Season of Interest Spring (Mid,Late)
Summer (Early,Mid,Late)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Tolerance Wet Soil
Attracts Birds
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Arisaema - Jack in the Pulpit

Guides with Arisaema - Jack in the Pulpit

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