Tim Laman / Botanist amongst the flowers of a Giant orchid (Grammatophyllum speciosum) growing high in the rainforest canopy in Borneo. This species is the world's largest orchid, with flowering stalks reaching 3...

Cyril Ruoso / Botanist Dr. Anton Weissenhofer using a drone to survey, part of tropical rainforest regeneration project. Golfito, Costa Rica. 2018.

Cyril Ruoso / Group of people including botanist Dr. Anton Weissenhofer planting trees in pasture, part of a tropical rainforest regeneration project. Golfito, Puntarenas, Costa Rica. 2018.

Cyril Ruoso / Botanist Dr. Anton Weissenhofer and colleague putting leaves into a press to create a herbarium. Leaves from trees planted in a former pasture four years previously, part of a tropical rainforest rest...

Edwin Giesbers / Orchid (Coelogyne swaniana) with botanist in the background, Botanic Garden Leiden, the Netherlands. September 2013.

Edwin Giesbers / Orchid (Bulbophyllum lobii) with botanist in the background, Botanic Garden Leiden, the Netherlands. September 2013.

Edwin Giesbers / Botanist working with orchids in greenhouse, Botanic Garden Leiden, Netherlands, July.

Paul D Stewart / Illustration of Joseph Dalton Hooker (1817- 1912) botanist, by George Richmond, reproduced in Hooker's ' Life and Letters'. Hooker was a good friend of Darwin and the director of Kew Gardens.

Paul D Stewart / Illustration of Sir Joseph Hooker (1817-1912) English botanist in middle age.

Paul D Stewart / Woodbury type photo of Sir Joseph Hooker (1817-1912) from 'Men of Mark', by Lock and Whitfield, published 1881 by Sampson Low.

Steve O. Taylor (GHF) / Chris - camera assistant and botanist filming, Democratic Republic of the Congo, Africa, February 2012.

Pat Tuson / Botanist looking at plant material through a hand lens, in urban meadow garden, Highbury, London Borough of Islington, England UK, January 2010

Pat Tuson / Botanist kneeling whilst surveying an urban garden under threat of development in the hope of finding a plant species which might save the site, Highbury, London Borough of Islington, England UK, Janu...

David Woodfall / Botanist using eye piece to identify Black Stem Rust, a fungus species which threatens future of world wheat crops. Radnorshire, Wales, UK, June.

David Woodfall / Botanist Ray Woods identifying grass species for participants on plant identification course. Radnorshire Wildlife Trust Nature Reserve, Wales, UK, June.

David Woodfall / Botanist Ray Woods identifying grass species with an eye piece. Radnorshire Wildlife Trust Nature Reserve, Wales, UK, June.

Ernie Janes / Botanist extracting seed from Field Cow Wheat (Melampyrum sp) which is nearly extinct in UK

Florian Möllers / Michael Ristow, a botanist with the University of Potsdam, investigating a site for Siberian Iris (Iris sibirica) in the Wuhlheide, Berlin, Germany, May 2008

Tim Laman / Botanist, George Weiblen, examining a (Ficus sp) plant in the rainforest. Mu Village vicinity, Chimbu Province, Papua New Guinea. 2005

Jason Smalley / David Bellamy, wildlife presenter and conservationist, UK. 2005

Jason Smalley / David Bellamy, wildlife presenter and conservationist, UK. 2005

Jason Smalley / David Bellamy, wildlife presenter and conservationist, UK. 2005

Jason Smalley / Scientist researching heathland habitat, identifying grasses, UK.

Jason Smalley / Scientist researching bogland habitat, identifying grasses, UK.

Doug Wechsler / Botanist identifies orchids in montane forest, Bentuang-Karimun, Indonesia.

Mark Moffett / Tree (Andreadoxa flava), the only known individual of a new tree genus living in a cocoa plantation, observed by its discoverer, Andre de Carvalho, Atlantic Forest ecosystem, Brazil

Mark Moffett / Yew (Taxus sp) tree nursery, source of Taxol drug, Sichuan Province, China

Michael Durham / Staff botanist for The Nature Conservancy, Susan Geer, works to distinguish native plants and non-native plants during a weed survey on Zumwalt Prairie Preserve

Richard Herrmann / Botanist hiking, San Benito Island, Baja California, Mexico

Gerry Ellis / Botanists from Papua New Guinea record specimens from plant survey in Kikori Basin, WWF ICDP 1995, Omo Village, Papua New Guinea

Paul D Stewart / Portrait of Joseph Dalton Hooker, 19th century botanist and explorer.

Paul D Stewart / Two of Darwin's staunchest supporters in the field during a trip to the Rockies in 1877. Left (seated) British botanist Joseph Dalton Hooker, the director of Kew and one of Charles Darwin's close frie...

Paul D Stewart / Two of Darwin's staunchest supporters in the field during a trip to the Rockies in 1877. Centre (seated) British botanist Joseph Dalton Hooker, the director of Kew and one of Charles Darwin's close fr...

Paul D Stewart / 1849 portrait of John Stevens Henslow (6 February 1796-16 May 1861), crop of lithographic portrait from life by Thomas Herbert Maguire as part of the Friends of the Ipswich Museum scientific portrait...

Paul D Stewart / Sir Joseph Banks, botanist and naturalist. (13th February 1743 - 19th June 1820). Engraving by C.E. Wagstaff with later colouring, after the painting of Banks as President of the Royal Society by Phil...

Paul D Stewart / Portrait of Carl Linnaeus mezzotint engraving by H. Kingsbury with later hand colouring, published by 'Dr. Thornton 1805 from an original in his possesion'. The original was by Martin Hoffman, painted...

Paul D Stewart / Portrait of James Cook, Captain of HMS Barc Endeavour (b. 7th November 1728 - d. 14th February 1779); steel engraving by E. Scriven 1833 with later hand colouring, after the painting by N. Dance 1775/...

Paul D Stewart / Johann Jakob Scheuchzer (born August 2nd 1672 - died June 23rd 1733). Swiss traveller naturalist and geologist. Contemporary Folio size Portrait copper engraving at 59 years old (1731) from Physica Sa...

Mark Moffett / Gilberto Alves de Lima raises plants from the forest to sell, Bahia State, Atlantic Forest ecosystem, Brazil

Mark Moffett / Distinguished Laelia Orchid (Laelia praestans) admired by botanist Ludovic Kollman, Espirito Santo, Atlantic Forest, Brazil

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, examining plant in tropical rainforest, Golfito, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, holding seedling, Golfito, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, using drone to look at tropical rainforest regeneration, Golfito, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, at tree nursery used in tropical rainforest regeneration, Golfito, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, botanist eating flower in tropical rainforest, Golfito, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, taking tree measurement in a pasture regenerated forest, Costa Rica

Cyril Ruoso / Botanist, Dr. Anton Weissenhofer, examining plant in tropical rainforest, Golfito, Costa Rica

Cyril Ruoso / Giant stump named Wilson-kabu, 32 m wide, cut in 1586 and re-discovered by American botanist Ernest Wilson, Yakushima Island, Japan