The interactive maps and data are hosted by the University Library
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The Online Atlas of Michigan Plants is dedicated to distributing information about the flora of Michigan to the public via the Internet. Currently it consists of online county-level maps and distribution data. The online interactive mapping system allows users to view county-level distribution maps of the approximately 2800 species of native and naturalized ferns, fern allies, gymnosperms, and angiosperms of Michigan. The online distributional data system allows retrieval of lists of counties for species specified by the user.
About the Interactive Maps and Customized Lists
The county level distributional data are updated from Michigan Flora, vols. 1-3 (Voss 1972-1996 ), supported by the Michigan Flora Database. The data include all species discovered new to the State through 2003.Fern and fern ally data, not included in Michigan Flora, are from the University of Michigan Herbarium collection database. Additional data about species is largely from Hermann et al (2001). County records are from the Michigan flora database and have been updated to include all specimens processed as of the end of 2003. All distributional information is based on the presence of at least one verified herbarium specimen. On the maps, the presence of a species in a county is indicated by a dot. The dot is positioned in the center of the county; no other geographical distribution is implied by the dot's location.A longer term goal of the Online Atlas of Michigan Plants is to permit web-mapping of the localities, rather than only the county-level distribution, of these records.
Nomenclature and Systematics
For ease of use and comparability, systematic treatments for the most part follow Michigan Flora. In the case of families and genera where Flora of North America ( ) volumes have been published, this list has tried to accommodate these treatments except for the order of taxa. Where FNA “split” species and genera, this list reflects that, except for some genera of Volume 4, which came out too late in this process to be completely incorporated and a few specific cases where application of FNA treatments to Michigan specimens was unusually difficult (e.g., Betula cordifolia). In those cases where FNA “lumped” species recognized as separate in Michigan flora, they have usually been left separate -- it being a much simpler matter to combine data than separate it. Obligatory nomenclatural changes have been made throughout the list, in so far as we were aware of them. In all cases, synonymy is presented for ease of reference. In the case of species where varieties or subspecies are recognized, these are only noted when there are more than one in Michigan.
Hybrids are not included unless they have often been treated as species or have been mapped in Michigan Flora.
The records in Michigan Flora, Volumes 1-3 are based on specimens in many herbaria. In some instances when species were “split,” there were some county records that were not assignable to species because it was not possible to examine all specimens. In these cases, there is a net loss of records, although the overall distribution patterns should be clear. For the most part, the density of records will be greater on the online maps, especially for Volume one and two species.
Approximately 2800 vascular plant species are documented in Michigan (view map showing number of species documented by county).
Retrieve customized lists of species by county or lists of counties by species here.
Use Google's image search engine to look for images of a plant species
Additions or corrections of data may be addressed to:
Tony Reznicek, Curator
University of Michigan Herbarium
3600 Varsity Drive
Ann Arbor, MI 48108-2287
e-mail: reznicek@umich.edu
Comments regarding the online maps, contact
Rachel Simpson
School of Natural Resources
University of Nebraska-Lincoln
Lincoln, NE 68583-0758
e-mail: rsimpson2@unl.edu
This website should be cited as
Online Atlas of Michigan Plants. A.A. Reznicek., E.G. Voss, & R. A. Simpson. Edition 1. April 2004. University of Michigan
followed by the date on which the web page was consulted and the URL of this
page.
To report technical problems in accessing the online maps, please contact nsds@umich.edu
This website and interactive maps were created by Tony Reznicek and Rachel Simpson
The interactive maps and data are hosted by the University
Library
Last update: