We thank Steve Brewer and Tom Hoogendyk, Biology Department, University of Massachusetts, Amherst, for help in developing the website. We also thank Steve Brewer for his enthusiasm and support throughout the project. Robert Cox and the staff of the University of Massachusetts Special Collection and University Archives helped find material relating to Clark’s year in Sapporo. We also thank the Harvard University Herbaria for access to their collections to look for specimens collected in Japan by W. S. Clark and D. P. Penhallow between 1876 and 1877.