Eight Sphagnum-dominated kettle-hole bogs in northern Michigan were analyzed to elucidate vegetation patterns of both vascular plants and Sphagnum species in relation to measured bog gradients. Methods of both direct and indirect gradient analysis, including ordinatinon and cluster analysis, were used. Community types as delineated in the ordination are discussed, including species distribution for sphagnum and vascular palnts. Segregation of community types followed gradients of pH, light, and calcium and magnesium ion concentrations. Two types of kettle-hole bogs were distinguished surrounding acid and alkaline bog lakes, respectively, each with its own continuum of community types.