Shrubs of Cheboygan and Emmet Counties, Michigan

Abstract

During the summers of 1930, 1931, and ten days in the middle of May 1931 collection of shrubs of Emmet and Cheboygan counties were made. The collecting was done in the vicinity of the University of Michigan Biological Station, the keying out and the checking of the identifications was done at the University of Michigan Herbarium. Since a floral key would be of little value to the summer student or research worker, the keys are based upon foliage characteristics. Sets of the specimetis collected were given to the University of Michigan Herbarium and to the University-of Michigan Biological Station Herbarium. A set has also been retained in the writer's personal Herbarium. The total number of shrubs reported for this region as compiled from various sources is about 140 species, but this number has been reduced because of the lack of specimens to substantiate some of the records. The following shrubs Spirea latifolia, Sorbus subvestita, Vaccinium vacillans, Vaccirnium corymbosum, Vaccinium uliginosum, Salix pyrifolia, Viburnum pubesc(ns and Rubus randii have been reported by others for the two counties, but as there appear to be no collections to verify them, they have been omitted. Cultivated shrubs have not been included unless they have spread from their original planting and become established elsewhere. The number of shrubs for Emmet and Cheboygan counties as thus limited is 128 specimens and 22 varieties or a total of 150. Twenty-five of the shrubs which are found in Cheboygan County are not found in Emmet County, and there are only 5 shrubs found in Emmet County which are not found in Cheboygan County. Two factors are responsible for this uneven distribution; first, Cheboygan County has been botanically surveyed more carefully than Emmet County; secondly, Cheboygan County has all the ecological communities that Emmet County has besides a very large jack pine plains area, which is absent in Emmet County. In the preparation of this paper Roserdahl and Butters' recent publication Trees and Shrubs of Minnesota was followed for nomenclature and sequence of families. The author wishes to thank Dr. J. H. Ehlers, under whom the work was done, for many helpful suggestions and encouragement. He also wished to express his appreciation of the aid of Dr. C. R. Ball, Dr. E. W. Erlanson, and Dr. K. M. Wiegand for checking over material of Salix, Rosa, and Amelanchier. He is also indebted to Dr. F. C. Gates for supplying data concerning habitats and to Mr. Arthur Blickle for checking the keys. Capital letter C indicates that the shrub is found in Cheboygan Countv ( 230)