1 Department of Genetics, Stanford School of Medicine, Stanford, CA 94305, USA.
2 Department of Biology, Stanford University, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford, CA 94305, USA. Electronic address: bergmann@stanford.edu.
Stomata are adjustable valves through which gas and water exchange occur in plant leaves. Here, McKown and Bergmann highlight the essential function and features of stomata from grasses.