ELECTRON MICROSCOPY: NON-HUMAN: FUN STUFF. PHYSOSTEGIA STOMATA AND SPINE OF LEAF; SCANNING ELECTRON MICROGRAPH. PHYSOSTEGIA STOMATA AND SPINE OF LEAF. THIS IMAGE IS FROM THE SMALL BIT OF LEAF THAT SURROUNDS THE BASE OF THE FLOWER OF THE "OBEDIENT PLANT" OR PHYSOSTEGIA. ONE STOMA IS SHOWN HERE. SEXY AINT IT?