Arabidopsis thaliana (L.) Heynh.
Common Name: MOUSE-EAR CRESS
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Forb

A Eurasian species found with other pioneer annuals in recently disturbed, usually sandy ground, including cultivated land, fields, and trails; spreading to sandy oak forests and even to moist sites. First collected in 1901 in Berrien Co. This species is the model organism in experimental biology, and its entire genome was sequenced in 2000.

Arabidopsis lyrata usually has slightly larger fruit and often ± lyrate rosette leaves. Both species flower very early (April–May) in southern Michigan. These species, as well as Braya humilis, have most of their leaves in a basal rosette, from which one to several stems arise. Draba verna, also similar in general aspect, differs from all three in its strictly scapose habit (no cauline leaves) and bifid petals, as well as in its broader fruit.

Locations

Allegan County
Barry County
Benzie County
Berrien County
Branch County
Cass County
Cheboygan County
Crawford County
Grand Traverse County
Gratiot County
Hillsdale County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Lake County
Leelanau County
Lenawee County
Livingston County
Luce County
Mackinac County
Mason County
Mecosta County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Ottawa County
St. Clair County
Van Buren County
Washtenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=602.