Arisaema serratum var. mayebarae is a striking woodland perennial valued for its dramatic dark flowers and elegant foliage.

This Japanese cobra lily produces a deep purple-black spathe that appears before the foliage, creating a bold focal point in shaded gardens.

• Height: up to 90cm
• Spread: 30–40cm
• Flower colour: dark purple to purple-black
• Flowering time: spring
• Position: partial shade to shade
• Soil: moist, humus-rich, well-drained soil

About Arisaema serratum var. mayebarae

Arisaema serratum var. mayebarae is a distinctive form of the Japanese cobra lily originating from southern regions of Japan.

This variety is notable for flowering earlier than many other forms of Arisaema serratum.

The plant produces a tall, elegant spathe with a long blade that arches above the flower structure.

The spathe is coloured deep purple to almost black and emerges before the foliage unfolds.

Once flowering finishes, the plant develops characteristic divided leaves that create a lush woodland appearance.

This unusual aroid makes a strong architectural statement in shaded planting schemes.

Synonyms include:

• Arisaema japonicum Blume
• Arisaema mayebarae

Benefits for UK Wildlife

Arisaema species contribute to woodland biodiversity.

• Provides shelter for insects in shaded garden areas
• Adds diversity to woodland planting
• Works well within wildlife-friendly shade gardens

Combine with ferns and other woodland plants to create a layered habitat.

Where to Grow Arisaema serratum var. mayebarae

• Woodland gardens
• Shaded borders
• Under trees and shrubs
• Naturalistic shade planting
• Collectors’ plant gardens

This plant is particularly effective when planted among other shade-loving perennials.

Planting Tips

• Plant tubers in spring.
• Choose a partially shaded or shaded location.
• Improve soil with compost or leaf mould.
• Plant tubers about 8–10cm deep.
• Keep soil moist during the growing season.

Apply mulch annually to recreate natural woodland soil conditions.

Why Grow Arisaema serratum var. mayebarae

• Striking dark purple-black spathe
• Early flowering compared to other varieties
• Elegant architectural woodland plant
• Excellent choice for shade gardens
• Unusual collector’s plant

If you enjoy unusual woodland plants, Arisaema serratum var. mayebarae offers dramatic flowers and elegant foliage for shaded garden spaces.