Adrian Davies / Blue Spikemoss (Selaginella uncinata) showing iridescence through change of angle in relation to light source

John Cancalosi / Fern (Selaginella emmeliana) showing sori / spores. Occurs in Central and South America.

Adrian Davies / Creeping club moss (Selaginella serpens) Barbados.

Sebastian Kennerknecht / Cakar Ayam (Selaginella doederleinii) ground cover, Tawau Hills Park, Sabah, Borneo, Malaysia

Hiroya Minakuchi / Spikemoss (Selaginellaceae), Danum Valley, Malaysia

Piotr Naskrecki / Spikemoss (Selaginella sp) leaf, New Britain, Papua New Guinea

Piotr Naskrecki / Spikemoss (Selaginella sp) covering boulders along creek in rainforest, Mount Gahavisuka Provincial Park, Papua New Guinea

Konrad Wothe / Electric Fern (Selaginella longipinna) in rainforest, archaic species, Daintree National Park, North Queensland, Australia, October

Adrian Davies / Krauss's spikemoss (Selaginella kraussiana) UK

Simon Colmer / Resurrection plant / Rose of Jericho / Farnmoss {Selaginella lepidophylla} plant with leaves open in wet conditions, sequence 2/2

Simon Colmer / Resurrection plant / Rose of Jericho / Farnmoss {Selaginella lepidophylla} plant curled up in tight ball in dry conditions and open in wet conditions

Simon Colmer / Resurrection plant / Rose of Jericho / Farnmoss {Selaginella lepidophylla} plant curled up in tight ball in dry conditions, sequence 1/2

Duncan Mcewan / Lesser clubmoss (Selaginella selaginoides) Scotland

John Waters / Blue fern {Selaginella} Sumatra, Indonesia

John Waters / Blue fern {Selaginella} Sumatra, Indonesia

Piotr Naskrecki / Spikemoss (Selaginella sp) covering boulders along creek in rainforest, Mount Gahavisuka Provincial Park, Papua New Guinea

Adrian Davies / Resurrection fern (Selaginella lepidophylla) dormant in dry conditions. Controlled conditions.

Adrian Davies / Resurrection fern (Selaginella lepidophylla) opening up and coming back to life after being exposed to moisture. Controlled conditions.

Morley Read / Red Snouted Treefrog (Scinax ruber) on a Selaginella frond. Yasuni National Park, Ecuador.

Staffan Widstrand / Wild Wonders of China / Taiwan Spike-moss (Selaginella repanda) Lu Shan, Taiwan

Philippe Clement / Pale spikemoss / pale spike-moss / moss fern (Selaginella pallescens) native to Mexico, Colombia and Venezuela. May

Philippe Clement / Pale spikemoss / pale spike-moss / moss fern (Selaginella pallescens) native to Mexico, Colombia and Venezuela. May