Willem Kolvoort / Water filled ditch with shadow of a tree on water with Fringed waterlily (Nymphoides peltata) Star duckweed (Lemna trisulca) Netherlands. July 2015. Commended in the Underwater World Category of the G...

Michael Hutchinson / Titan arum (Amorphophallus titanum), in flower, cultivated specimen in botanic garden, native to Sumatra. Kew Gardens, London, UK. 23 April 2016 This species has the largest unbranched flower inflores...

Michael Hutchinson / Titan arum (Amorphophallus titanum), in flower, cultivated specimen in botanic garden, native to Sumatra. Kew Gardens, London, UK. 23 April 2016 This species has the largest unbranched flower inflores...

Georgette Douwma / Swiss cheese plant (Monstera deliciosa) in flower, close up of spadix.

Guy Edwardes / 2020VISION / Wild arum / Cuckoo Pint (Arum maculatum) backlit in late eveing sunlight, Collard Hill, Somerset, England, UK. April

Steve Nicholls / View up through leaves of Lords and Ladies / Cuckoo-pint (Arum maculatum) Leigh Woods, Bristol, UK, May

Alex Hyde / Enormous inflorescence of Arum plant (Amorphophallus sp) Dry deciduous forest, Kirindy Forest, Western Madagascar. October.

Wild Wonders of Europe / Lilja / Cretan arum (Arum creticum) flowers, Katharo, Crete, Greece, April 2009

Luiz Claudio Marigo / Imbe vine {Philodendron spruceanum} Mamiraua Ecological Station, Amazonas, Brazil

Tony Heald / RF- Hippopotamus (Hippopotamus amphibius) surrounded by water lettuce. Kruger National Park, South Africa. (This image may be licensed either as rights managed or royalty free.)

Neil Lucas / Close-up detail of Titan Arum inflorescence, Sumatra

Neil Lucas / Titan arum (Amorphophallus titanum) Summatra. This species has the largest unbranched flower inflorescence which smells strongly of rotting carrion.

Jeff Foott / Indian Rhubarb (Darmera peltata) growing on rock in river, Cascade Creek, Yosemite National Park, California

Michael & Patricia Fogden / Elephant Ears (Xanthosoma robustum) and bamboo in cloud forest, Monteverde Cloud Forest Reserve, Costa Rica

Kevin Schafer / Whitespot Giant Arum (Amorphophallus paeoniifolius) inflorescence, Tompotika Peninsula, central Sulawesi, Indonesia

Winfried Wisniewski / Hippopotamus (Hippopotamus amphibius) covered with water lettuce, Masai Mara, Kenya

David Fleetham / A taro (Colocasia esculenta) field on the island of Yap, Federated States of Micronesia, Pacific Ocean.

Jack Dykinga / Cypress dome swamp with water surface covered with Water-spangles (Salvinia minima) and Duckweed (Lemna), Big Cypress Seminole Indian Reservation, Florida, USA.

Jack Dykinga / Cypress dome swamp with water surface covered with Water-spangles (Salvinia minima) and Duckweed (Lemna), Big Cypress Seminole Indian Reservation, Florida, USA.

Bruce Thomson / Australian native monstera (Epipremnum pinnatum) in lowland, tropical rainforest, Innisfail, Northern Queensland, Australia.

Guy Edwardes / Splendid treefrog (Cruziohyla calcarifer) on Swiss cheese plant (Monstera deliciosa), Lowland rainforest, Costa Rica.

Andy Rouse / European otter (Lutra lutra) swimming in a pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions.

Andy Rouse / European otter (Lutra lutra) swimming in pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions.

Andy Rouse / European otter (Lutra lutra) jumping from jetty into a pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions.

Andy Rouse / European otter (Lutra lutra) jumping from jetty into a pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions.

Andy Rouse / European otter (Lutra lutra) jumping from jetty into a pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions.

Andy Rouse / RF - European otter (Lutra lutra) jumping from jetty into a pond covered with Common duckweed (Lemna minor), West Country Wildlife Centre, Okehampton, Devon, UK. August. Controlled conditions. (Thi...

Chris Mattison / Water lettuce (Pistia stratiotes), Borneo, Malaysia

Derek Galon / Elephant foot yam (Amorphophallus paeoniifolius) one of largest flowers in the world. Blooming in Papillote Garden, Dominica, West Indies.

Derek Galon / Elephant foot yam (Amorphophallus paeoniifolius) one of largest flowers in the world. Blooming in Papillote Garden, Dominica, West Indies.

Linda Pitkin / Dragon arum (Dracunculus vulgaris). Naturalised in Frylands Wood, Surrey, England, UK. June.

Linda Pitkin / Dragon arum (Dracunculus vulgaris), naturalised in woodland. Frylands Wood, Surrey, England, UK. June.

Linda Pitkin / Dragon arum (Dracunculus vulgaris) with unopened spathe, naturalised in Frylands Wood. Surrey, England, UK. June.

Staffan Widstrand / Wild Wonders of China / Large leaf of Giant Elephant's Ear (Alocasia odora), in rainforest, Yangminshan, Taiwan

Staffan Widstrand / Wild Wonders of China / Close up of large leaf of a Giant Elephant's Ear (Alocasia odora) a rainforest plant, underside, Yangmingshan National Park, Taipei, Taiwan

Fabian Muhlberger / Wild Wonders of China / Close up of undergrowth in Taiwanese montane forest, Alocasia leaf in foreground, Taiwan.

Fabian Muhlberger / Wild Wonders of China / Alocasia sp. after rain in Taiwan montane forest , Taiwan.

Ernie Janes / Cuckoo Pint (Arum maculatum) growing in spring woodland, Norfolk, England, UK, April.

Linda Pitkin / Lords-and-ladies (Arum maculatum), stem with flowers on inflorescence (spadix), and stem with berries. Watercolour illustration.

Robin Chittenden / Water vole (Arvicola amphibius) looking out of hole in root curtain covered with Duckweed (Lemna sp). Norwich, Norfolk, England, UK. May.

Linda Pitkin / Rootless duckweed (Wolffia arrhiza) in pond. A rare plant in Surrey, Least Duckweed (Lemna minuta) is also present. North of Haxted, Surrey England, August. Vulnerable in England.

Linda Pitkin / Rootless duckweed (Wolffia arrhiza), in a pond. Locally rare plant. Least Duckweed (Lemna minuta) is also present. North of Haxted, Surrey England, August. Vulnerable species in England.

Linda Pitkin / Greater duckweed (Spirodela polyrhiza), in pond. Crystal Palace Park, Kent, England, July.

Steve Nicholls / Cuckoo pint or Lords and Ladies (Arum maculatum) in Lower Woods, Gloucestershire, UK. April.

Edwin Giesbers / Elderly man with Taro crop (Colocasia esculenta) Madeira.