Scott Leslie / Cinnamon Fern (Osmunda cinnamomea) group in forest, Nova Scotia, Canada

Scott Leslie / Cinnamon Fern (Osmunda cinnamomea) group on forest floor, Canada

Scott Leslie / Cinnamon Fern (Osmunda cinnamomea), Canada

Michel Poinsignon / Royal fern (Osmunda regalis) on river between Leon pond and Atlantic Ocean, Courant D'Huchet, Landes, France, August.

Ernie Janes / Royal Fern (Osmunda regalis) growing in heathland bog, Winterton, Norfolk, UK

Adrian Davies / Royal Fern (Osmundia regalis) close-up of leaves, Dartmoor, England, UK, August

Philippe Clement / Royal fern (Osmunda regalis) leaves and spore-bearing fronds, Belgium

Philippe Clement / Royal fern (Osmunda regalis) leaves and spore-bearing fronds, Belgium

Laurie Campbell / Royal Fern (Osmunda regalis) Isle of Rum, Scotland, July

Philippe Clement / Royal fern (Osmunda regalis) fronds unfurling, Belgium

Nature Production / Japanese Flowering Ferns {Osmunda japonica} Japan

Adrian Davies / Royal Fern {Osmunda regalis} Dartmoor, UK.