Williamsia phyllosphaerae Kämpfer et al. 2011 Kämpfer P. Wellner S. Lohse K. Lodders N. Martin K. Williamsia phyllosphaerae sp. nov., isolated from the surface of Trifolium repens leaves 2011 61 11 2702 2705 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.029322-0 21169464