STUDIES IN SAXIFRAGACEAE: III. SAXIFRAGA ODONTOLOMA AND LYALLII, AND NORTH AMERICAN SUBSPECIES OF S. PUNCTATA

Abstract

The taxonomy and phytogeography of Saxifraga odonloloma (S. argula auct.), S. lyallii, and S. punctata are presented. S. odonloloma is not closely related to S. punctata but is much more closely allied to S. lyallii with which it hybridizes. S. lyallii is divided into two varieties, var. lyallii near the 49th parallel, and var. hultenii var. nov. from Alaska to southern B.C. S. punctata is divided into six subspecies in North America: sspp. nelsoniana (D. Don) Hult., insularis Hult., pacifica Hult., carlottae ssp. nov., cascadensis ssp. nov., and porsildiana ssp. nov.