Thread fern (Icarus filiformis)

Thread fern

Thread fern grows only in New Zealand and is the only known species in its genus. It creeps on the ground and climbs on other plants and is unusual for having three distinct frond types: one with round leaves, one with pointed leaves that it uses to climb, and a third that appears thread-like, which produces fertile spoors.

Scientific classification

Species

Thread fern (Icarus filiformis)

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Perennial

Lifespan

Herb

Plant Type

Green, Blue

Leaf Color

Images of Thread fern

Distribution of Thread fern

Distribution Map

Thread fern is native to the temperate oceanic climates, particularly regions in the Southern Hemisphere. Its native range is rather limited, confined to areas characterized by specific environmental conditions. While thread fern's presence outside of its native region is not well-documented, it doesn't appear to have an extensive introduced range, suggesting that its cultivation and naturalization in other regions have been minimal or non-existent.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Thread fern

Every week

Water

Partial sun

Sunlight

Water: Thread fern prefers consistent moisture and should be watered weekly to prevent drought stress. Typically grown indoors, it thrives in humid environments and benefits from higher ambient moisture or frequent misting to replicate its native tropical habitat.

Pruning: Thread fern has delicate fronds and needs careful pruning during early to late spring. Remove dead or damaged fronds to encourage growth and improve air circulation, reducing pests. Use sharp, clean tools for minimal damage, ensuring the plant remains healthy and visually appealing.

Propagation: The thread fern features feathery foliage and can be propagated by cutting healthy, non-flowering stems. Utilize a well-draining soil mix with organic material, ensuring humidity is maintained without overwatering. Protect cuttings from direct sunlight and monitor moisture to encourage successful root development.

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