https://www.botanicalartandartists.com/botanical-photographers.html
http://www.artnet.com/artists/karl-blossfeldt/equisetum-hyemale-dutch-rush-scouring-rush-cross-a-3cJWMYbhymHQCtv1p7FzTw2
https://www.michaelhoppengallery.com/exhibitions/120/overview/#/image_standalone/535
https://www.michaelhoppengallery.com/artists/58-karl-blossfeldt/overview/#/artworks/9984
http://www.faena.com/aleph/articles/karl-blossfeldt-the-tactile-qualities-of-botanical-photography/