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Page 90 ï~~90 THE MICHIGAN BOTANIST Vol. 46 THE BIG TREES AND SHRUBS OF MICHIGAN 52. Cercis canadensis L. Eastern Redbud Elwood B. Ehrle Gail McPherson Dept. of Biological Sciences Global ReLeaf of Michigan Western Michigan University 1100 N. Main St. #105 Kalamazoo, MI 49008 Ann Arbor, MI 48104 Richard Pomorski 24 Pine Drive Whitmore Lake, MI 48189 The largest known Eastern Redbud tree in Michigan is located in Wayne, MI in Wayne County in the southeast portion of Michigan's Lower Peninsula. Description of the species: The Eastern Redbud is a small tree in the family Fabaceae (formerly Leguminosae). It can be easily recognized by its bilaterally symetrical bright pink flowers which appear during April-May before or with the leaves. The fruit is a 2-3" pod or legume which develops during June but is persistent and usually abundant on the trees during the winter. The leaves are broad, heart-shaped, and entire (See Fig. 1). The twigs are slender and zig-zag. Native Eastern Redbuds reach their northern limit in Southern Michigan (Voss, 1985). They are much more abundant further south and are particularly noticeable in the Appalachian mountains during the spring. They are, however, widely planted and hence occur further north than their native range. A white-flowered form (var. alba) is known (Dirr, 1983) but is infrequently seen. There is only one listed in the "Michigan Big Tree and Shrub Inventory". It was recently reported by Robert Bloye as present on the Michigan State University campus in East Lansing, MI. Location of Michigan's Big Tree: The State Champion Eastern Redbud is located in front of the Annapolis Hospital in Wayne, MI. The tree can be reached by taking 1-94 east to the Wayne Road exit. Turn left (N) and follow this to Van Born. Turn right (E) and follow Van Born to Veney Rd. Turn left and go to Annapolis Rd. Turn left. The hospital entrance is on the left at 33155 Annapolis Rd. The tree is directly in front of the hospital. Description of Michigan's Big Tree: The tree has a solid healthy trunk. The tree was measured by Gail McPherson and Richard Pomorski in 2004. The girth at 4Y' is 113". The height is 26'. The average crown spread is 35'.The total number of points (G + H + Y C.S.) for this tree is, therefore, 113 + 26 + 9 = 148. The 2004-5 National Champion tree is in Topeka, KS. It has a girth of 92", a height of 39' and an average crown spread of 40'. The total number of points for the National Champion tree is 92 + 39 + 10 = 141. The Michigan tree is larger and will be submitted to American Forests for consideration as a new National Champion Tree.
Page 91 ï~~2007 THE MICHIGAN BOTANIST 91 74 <-"; '..\ -- -rr'....i. _L -L -'io _ ma is fro oss The aseikshw.hlcto FIGURE 1. Documented Distribution in Michigan and Characteristics of the Eastern Redbud. The map is from Voss (1985). The asterisk shows the location of Michigan's Champion tree. The illustrations are from Barnes and Wagner (2004). 1. Winter twig, x 1. 2. Portion of twig, front view, enlarged. 3. Portion of twig, side view, enlarged. 4. Leaf x %. 5. Flowering twig. x 1. 6. Vertical section of flower, enlarged. 7. Fruit, legume, x %. INVITATION TO PARTICIPATE If you would like to join in extending this series of articles by visiting and describing one or more of Michigan's Big Trees, please contact Elwood B. Ehrle (woodyehrle5098 @sbcglobal.net) for help with locations, specifications for taking measurements and assistance with the manuscript. The Michigan Botanical Club encourages your involvement with this activity. Please remember to ask
Page 92 ï~~92 THE MICHIGAN BOTANIST Vol. 46 permission before entering private property. For a list of Michigan's Champion Trees and Shrubs see Ehrle (2003). LITERATURE CITED Barnes, B.V. and W.H.Wagner, Jr. (2004). Michigan Trees: a Guide to the Trees of the Great Lakes Region. Rev. Edit. University of Michigan Press, Ann Arbor, MI. x + 447 pp. Ehrle, E. B. (2006). The big trees and shrubs of Michigan. The Michigan Botanist 45(2): 65-152. Voss, E. (1985). Michigan Flora. Part II Dicots (Saururaceae - Cornaceae). Bull. Cranbrook Inst. Sci. 59 and Univ. of Michigan Herbarium. xiv + 487 pp.