Lecanopteris Mirabilis

The Miraculous Ant Fern

What Is Lecanopteris mirabilis?

Lecanopteris mirabilis is a rare tropical fern known for its swollen, sculptural rhizome that naturally forms hollow chambers for ants in the wild. The name mirabilis means “remarkable,” reflecting its unusual and eye-catching structure.

Native to Southeast Asia, this species grows as an epiphyte, attaching itself to trees in warm, humid forests. In nature, ants live inside the hollow rhizome and protect the plant. In cultivation, ants are not required, but the plant still develops its thick, textured base.

It is not an aquatic plant and should not be submerged. Instead, it grows best mounted on wood or in very airy, well-draining media with high humidity and good airflow.

Strange and architectural, Lecanopteris mirabilis is ideal for collectors who enjoy rare ferns with strong natural character.

How It Grows

This fern grows from a creeping rhizome that becomes swollen and hollow over time. The rhizome expands slowly and develops a rugged, sculptural surface.

Fronds grow upward from the rhizome, forming a compact yet structured display.

Growth is slow to moderate under stable tropical conditions.

The Leaves (Fronds)

The fronds are narrow and neatly divided.

• Color: bright to medium green

• Surface: smooth

• Shape: segmented and slightly arching

The clean green foliage contrasts beautifully with the thick rhizome.

Light Needs

Prefers bright, indirect light.

• Avoid direct sunlight

• Filtered light supports steady frond growth

Low light may slow development.

Water & Growing Conditions

• Keep medium lightly moist but never soggy

• Use very well-draining, airy substrate or mount on wood

• Requires moderate to high humidity

• Ideal temperature: 22–30°C

Good airflow is important to prevent rot.

Growing Environment

Best suited for:

• Mounted displays

• Orchid-style pots

• Greenhouses or humidity cabinets

Not suitable for aquariums or submerged setups.

Care Level

Medium care.

• Suitable for growers with some experience

• Sensitive to overwatering

• Slow-growing but long-lasting

Handling Note

Do not bury the rhizome deeply in soil. Keep it exposed or lightly covered to allow airflow. With stable warmth and humidity, Lecanopteris mirabilis will gradually develop a larger and more textured rhizome over time.