The climbing fern that acts like a vine, defying standard botanical expectations

Gardening · Published 3 October 2026 Swipe more like this →

In short: Most ferns stay low to the ground, but Lygodium breaks the mold. These unique plants grow long, flexible fronds that twine around supports like vines, reaching lengths of up to 39 feet. With dormant buds ready to activate if damaged, they possess a remarkable, almost indestructible resilience.

Lygodium, a genus comprising approximately 40 species, is a botanical outlier. While most ferns are defined by their static growth, Lygodium fronds exhibit indeterminate growth, unrolling and twining around structures to form distinct, vine-like shapes. This structural flexibility is supported by a thin, elongated rachis that can extend between 3 and 12 meters. Perhaps most impressive is their biological insurance policy: these ferns feature apical buds that remain dormant until the main rachis suffers damage, at which point the plant can regenerate, granting it a high degree of endurance in varied environments.

The genus is primarily pan-tropical, with the highest diversity found across Pacific islands like Borneo, the Philippines, and New Guinea. While they thrive in tropical climates, some species have adapted to temperate zones. The absence of Lygodium in Europe is often linked to the Pleistocene glaciation. Unlike in North America or Japan, where mountain ranges like the Appalachians run north-south, the European Alps run east-west, effectively blocking the southward migration of species seeking to escape the encroaching ice. Today, these ferns are valued in the Philippines, where their fibers are woven into traditional headgear known as salakot.

However, this adaptability has a dark side. In the southeastern United States, certain species have become aggressive invaders. Lygodium japonicum, for instance, was designated a noxious weed in Florida in 1999 and creates significant operational hurdles for the pine straw industry. Even more destructive is Lygodium microphyllum, which can overtake cypress swamps and hydric sites, creating dense monocultures that displace native biodiversity. Florida researchers have observed that these populations have expanded by more than 12 times in just the last ten years, highlighting the ecological impact of a plant that refuses to stay in its native range.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• The secret to the success of 11,000 fern species lies in a single cell
• Ancient survivors that trade flowers for spores and secrets
• Wood ferns are ancient survivors that have been evolving for 100 million years
• Ancient survivors that trade seeds for spores and shadows for strength
• From Ancient Survivors to Modern Garden Staples: Choosing the Perfect Fern for Your Space
• Magnolias are ancient survivors that bloomed on Earth long before the first bees arrived.
• The ancient clubmoss that once simulated massive industrial explosions for scientific study
• Why the ancient Magnolia family is a botanical puzzle that defies simple classification
• These ancient spore-bearing plants once towered over Earth as massive, coal-forming forests
• Why one of the world's largest plant orders is a botanical mystery
• These ancient plants have survived 380 million years by holding onto their genetic past
• The wild apple forests of Kazakhstan hold the genetic key to our future fruit

More in Plants · More in Gardening · Latest · A–Z · All topics