Karl Blossfeldt (June 13, 1865 – December 9, 1932) was a German photographer, sculptor, teacher, and artist who worked in Berlin, Germany. He is best known for his close-up photographs of plants and living things, published in 1929 as Urformen der Kunst. He was inspired, as was his father, by nature and the ways in which plants grow. He believed that 'the plant must be valued as a totally artistic and architectural structure.'
Among his students at the Berlin Arts and Crafts School was Heinz Warneke. From 1924, he was professor at the Vereinigte Staatsschulen für freie und angewandete Kunst (United State's Schools for Fine and Applied Art) in Berlin, Germany.
Blossfeldt made many of his photographs with a homemade camera that could magnify the subject up to thirty times its size, revealing details within a plant's natural structure. Appointed for a teaching post at the Institute of Royal Arts Museum in 1898 (where he remained until 1930), he established an archive for his photographs. Blossfeldt never received formal training in photography, but apprenticed under Moritz Muerer from 1892-1897. Blossfeldt developed a series of home-made cameras that allowed him to photograph plant surfaces in unprecedented magnified detail. This reflected his enduring interest in the repetitive patterns found in nature's textures and forms.
In Berlin from the late nineteenth century until his death, Blossfeldt’s works were primarily used as teaching tools and were brought to public attention in 1928 by his first publication Urformen der Kunst (Art Forms in Nature). Published in 1928 when Blossfeldt was 63 and a professor of applied art at the Vereinigte Staatsschulen für freie und angewandte Kunst, Urformen der Kunst quickly became an international bestseller and in turn, made Blossfeldt famous almost overnight. The abstract shapes and structures in nature that he revealed impressed his contemporaries. Swiftly regarded as a seminal book on photography, Blossfeldt’s objective and finely detailed imagery was praised by Walter Benjamin, who declared that Blossfeldt ‘has played his part in that great examination of the inventory of perception, which will have an unforeseeable effect on our conception of the world’. He compared him to Moholy-Nagy and the pioneers of New Objectivity, and ranked his achievements alongside the great photographers August Sander and Eugène Atget. The Surrealists also championed him, and Georges Bataille included his images in the periodical Documents in 1929. The publication of his working collages in 2001  threw into question the legitimacy of his association with New Objectivity, as his methods were shown to differ from those of other artists in the movement.
In 2001 Urformen der Kunst was included in "The Book of 101 Books" as one of the seminal photographic books of the twentieth century.
- Blossfeldt, Karl, Urformen Der Kunst: Photographische Pflanzenbilder, Verlag Ernst Wasmuth A.G. Berlin, 1929
- Cunningham, Mary Mullen, Heinz Warneke (1895-1983): A Sculptor First and Last, University of Delaware, Newark, DE, 1994 p. 22
- Gert Mattenklott: "Blossfeldt goes down in Benjamin’s Kleine Geschichte der Photographie (1931) as a major authority of the ‘optico-unconscious,’ equal in importance to Atget, Sander, and Germaine Krull, and, along with these, a defender of ‘Fortress Objectivity” against the pap of photographic synopsis.", in Blossfeldt, Karl; Bataille, Georges, 1897-1962; Mattenklott, Gert, 1942- (1999), Karl Blossfeldt : art forms in nature : the complete edition (the complete ed.), Schirmer Art Books, ISBN 978-3-88814-627-5CS1 maint: multiple names: authors list (link)
- Blossfeldt, Karl (2001). Working collages. Wilde, Ann., Wilde, Jürgen. Cambridge, Mass.: MIT Press. ISBN 0262025019. OCLC 45024416.
- Roth, Andrew, 1958-; Benson, Richard, 1943-; Aletti, Vince; Strauss, David Levi (2001), The book of 101 books : Seminal photographic books of the 20th century, Roth Horowitz, ISBN 978-0-9670774-4-4CS1 maint: multiple names: authors list (link)