Sumac (Assyrian:ܣܘܼܡܵܩܵܐ "Sumaq" red-red shift-turning red, , or ; also spelled sumach) is any one of about 35 species of flowering plants in the genus Rhus and related genera, in the family Anacardiaceae. Sumacs grow in subtropical and temperate regions throughout the world, especially in Africa and North America.

Stanford University Mathematics Camp, or SUMaC, is a competitive summer mathematics program for rising high school juniors and seniors around the world. The camp lasts for 4 weeks, usually from mid-July to mid-August. It is based on the campus of Stanford University.