Doug Wechsler / Treefern in subtropical rainforest. Luquillo NF, Puerto Rico, West Indies

Thomas Marent / Tree fern in rainforest, Putumayo, Colombia

Thomas Marent / Tree fern in rainforest, Putumayo, Colombia

Chien Lee / Orchid (Pedilochilus perpusillum) flowers on tree fern trunk, Snow Mountains, Papua, Indonesia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1500 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Treefern (Cyathea sp), Yakushima Island, Japan

Piotr Naskrecki / Treefern (Cyathea sp), Mount Gahavisuka Provincial Park, Papua New Guinea

Piotr Naskrecki / Treefern (Cyathea sp) group lining creek, Rimutaka Forest Park, New Zealand

Yva Momatiuk & John Eastcott / Tree Fern (Dicksonia antarctica) in rainforest, Otway National Park, Victoria, Australia

Yva Momatiuk & John Eastcott / Subtropical rainforest near Fox Glacier, South Island, New Zealand

Yva Momatiuk & John Eastcott / Stream in subtropical rainforest, South Island, New Zealand

Yva Momatiuk & John Eastcott / Silver Tree Fern (Cyathea dealbata) group near trail in subtropical rainforest near Fox Glacier, South Island, New Zealand

Yva Momatiuk & John Eastcott / Silver Tree Fern (Cyathea dealbata) group in subtropical rainforest near Fox Glacier, South Island, New Zealand

Chien Lee / Tree Fern (Cyathea moluccana) and waterfall, Kubah National Park, Malaysia

Konrad Wothe / Rain in rainforest, Daintree National Park, North Queensland, Queensland, Australia

Konrad Wothe / Rainforest landscape with tree ferns, Atherton Tableland, Queensland, Australia

Patricio Robles Gil / Jack Dykinga photographing a tree fern in the El Triunfo Biosphere Reserve, Sierra Madre del Sur, Chiapas, Mexico, for the ILCP Rapid Assessment Visual Expedition (RAVE) April 2007

Colin Monteath / Tree Fern (Cyatheaceae) above rugged beaches, Paparoa National Park, New Zealand

Richard Du Toit / Tree Fern (Cyatheaceae) frond showing underside, Gauteng, South Africa

Kevin Schafer / Treefern (Cyathea sp) fronds in rainforest, Marojejy National Park, Madagascar

Colin Monteath / Tree Fern (Dicksonia sp) forest near Haast Pass, New Zealand

Colin Monteath / Tree Fern (Dicksonia sp) forest near Haast Pass, New Zealand

Colin Monteath / Tree Fern (Dicksonia sp) forest near Haast Pass, New Zealand

Colin Monteath / Coastline north of Punakaiki, Paparoa National Park, New Zealand

Piotr Naskrecki / Tree Fern (Alsophila manniana) forest interior, Atewa Range, Ghana

Shaun Barnett / Tree Fern (Dicksonia antarctica) over stream, Tasmania

Adam White / Stream in treefern forest, Coromandel Penninsular, North Is, New Zealand

Adam White / Tree ferns in forest, Coromandel Penninsular, North Is, New Zealand

Michael & Patricia Fogden / Tree Fern (Dicksonia antarctica) looking down onto ferns, Tahune Forest Reserve, Tasmania, Australia

Matthias Breiter / Tree Fern (Dicksonia antarctica) cluster and Eucalyptus trees, Tarra-Bulga National Park, Victoria, Australia

Konrad Wothe / Tree Fern (Dicksonia antarctica) group in rainforest, Monro Walk, west coast, South Island, New Zealand

Ch'ien Lee / Tree Fern (Cyathea tomentosissima) group in alpine grassland, Mount Trikora, Papua New Guinea

Chien Lee / Rhododendron (Rhododendron caespitosum) flowers on trunk of Tree Fern (Cyathea tomentosissima), smallest species, Lake Habbema, West Papua, Indonesia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Cyril Ruoso / Bromeliad (Bromeliaceae) and tree fern at 1600 meters altitude in tropical rainforest, Sierra Nevada de Santa Marta National Park, Colombia

Piotr Naskrecki / Treefern (Cyathea sp) and Kawakawa (Macropiper excelsum), New Zealand

Yva Momatiuk & John Eastcott / Mountain-ash (Eucalyptus regnans) forest, Otway National Park, Victoria, Australia

Yva Momatiuk & John Eastcott / Myrtle Beech (Nothofagus cunninghamii) trees overgrown with mosses and epiphytes and Tree Ferns (Dicksonia antarctica) covering the forest floor, Otway National Park, Victoria, Australia

Yva Momatiuk & John Eastcott / Tree Fern (Dicksonia sp) group in subtropical rainforest, Westland National Park, South Island, New Zealand

Yva Momatiuk & John Eastcott / Silver Tree Fern (Cyathea dealbata) near trail in subtropical rainforest near Fox Glacier, South Island, New Zealand

Yva Momatiuk & John Eastcott / Silver Tree Fern (Cyathea dealbata) and moss covered trees in subtropical rainforest near Fox Glacier, South Island, New Zealand