Blood Agar Plates---This website discusses the history of blood agar plates and hemolysis protocols. This picture also displays the different types of growth in a blood agar plate; beta, alpha, and gamma.
Pseudomonas aeruginosa on blood agar. Note the metallic sheen and ground glass appearance. Depending on who you are it can smell like grapes, new shoes, or dirt. To me it smells like grapes. One of the friendlier smells in the micro lab.
Colony morphology of four bacteria: E.coli (Gram-negative rods), P.aeruginosa (Gram-negative rods), S.aureus (Gram-positive cocci; colony surrounded by a zone of beta-hemolysis) and S.epidermidis (Gram-positive cocci) on blood agar.