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Excerpt from Phytologia, Vol. 72: An International Journal to Expedite Plant Systematic, Phytogeographical and Ecological Publication; March 1992 The concepts presented in this study are derived from examination of more than 2000 Specimens, representing the whole geographic range of the group, although the taxa are primarily centered in California. Using the keys and distribution maps, identifications can be made with relative confidence. The nature of the characters that delimit the varietal taxa, however, will be easier to interpret with reference Specimens for comparison. Chromosome counts have been made for eleven of the taxa included here (as documented below; all recorded here in gametophytic form, regardless of how they were reported). All of the taxa counted, except one of the peripheral species, are diploid. The discovery that polyploids were more common would not be unexpected, since they are known to be common in Erigeron even within single species without taxonomic subdivision. Their presence, however, in whatever pattern, would probably not alter the taxonomic structure presented here. The taxa are treated alphabetically. Authorships for all names mentioned in the text can be found in the formal nomenclature. Designations of geo graphic provinces in California follow Hickman Specimens are cited for new or rare taxa and elsewhere when necessary to clarify critical differences with previous taxonomic treatments. Taxa that are more common and more easily recognized are documented by detailed mapping; a single symbol may represent numerous collections for commonly collected taxa. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In