Lecanopteris Spinosa

The Spiny Ant Fern

What Is Lecanopteris spinosa?

Lecanopteris spinosa is a rare tropical epiphytic fern known for its thick, swollen rhizome covered with small spine-like projections. The name spinosa means “spiny,” referring to the textured surface of its unique base.

Native to Southeast Asia, this fern grows attached to trees in warm, humid forests. In nature, ants live inside its hollow rhizome and help protect the plant. In cultivation, ants are not necessary, but the plant still develops its bold, sculptural form.

It is not an aquatic plant and should never be submerged. Instead, it grows best mounted on wood or in very airy, well-draining media with stable humidity.

Distinct and dramatic, Lecanopteris spinosa is perfect for collectors who enjoy unusual ferns with strong character.

How It Grows

This fern grows from a creeping, swollen rhizome that becomes thicker and more textured over time. The rhizome may develop hollow chambers and small spine-like bumps.

Fronds grow upward and slightly outward from the rhizome, forming a balanced display.

Growth is slow to moderate under stable tropical conditions.

The Leaves (Fronds)

The fronds are narrow and divided.

• Color: bright to medium green

• Surface: smooth

• Shape: segmented and slightly arching

The clean green foliage contrasts strongly with the rugged, spiny rhizome.

Light Needs

Prefers bright, indirect light.

• Avoid direct sunlight

• Filtered light supports steady growth

Low light may slow development.

Water & Growing Conditions

• Keep medium lightly moist but not 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 spinosa will gradually develop a larger and more textured rhizome over time.