Guild of Natural Science Illustrators

The Guild of Natural Science Illustrators (GNSI) is an international non-profit organization based in Washington, D.C. to serve the field of visual science communication, including scientific illustration, medical illustration, and botanical illustration. == History == The organization was founded in 1968 by a group of scientific and botanical illustrators working for the Smithsonian Institution, including Carolyn Bartlett Gast.

Source: Wikipedia — Guild of Natural Science Illustrators (CC BY-SA 4.0)