Eastern redbud is a native, deciduous, small tree or shrub. Mature
height ranges from 25 to 50 feet (7.6-15.2 m); the smaller figure is
probably closer to average [15,16]. The crown is flat to rounded .
The trunk us usually straight, branching about 5 to 9 feet (1.5-2 m)
above the ground . The 0.5-inch- (1.2-cm) thick bark becomes scaly
on older stems [11,16]. The root system of eastern redbud is long and
coarse with a relatively small number of fine feeder roots near the
surface . The fruit is a flat, thin-walled legume (pod) 1.5 to 3.9
inches (4-10 cm) long and 0.32 to 0.72 inches (8-18 mm) broad, with
several hard, shiny seeds .
The national champion (1976) eastern redbud from Springfield, Missouri,
measured 47 feet tall (14.3 m), 8.17 inches (20.75 cm) in circumference,
and had a crown spread 36 feet (10.9 m) in diameter .
Unlike most other members of the Fabaceae, eastern redbud does not form
root nodules and does not appear to fix nitrogen .
- 11. Brown, Russell G.; Brown, Melvin L. 1972. Woody plants of Maryland. Baltimore, MD: Port City Press. 347 p. 
- 15. Collier, Clifford W., Jr.; Longenecker, George W. 1972. Cultivation of eastern redbud (Cercis canadensis). Misc. Pub. 434. Morgantown, WV: West Virginia University, Cooperative Extension Service. 2 p. 
- 16. Collingwood, G. H.; Brush, Warren D.; [revised and edited by Butcher, Devereux]
- 23. Godfrey, Robert K. 1988. Trees, shrubs, and woody vines of northern Florida and adjacent Georgia and Alabama. Athens, GA: The University of Georgia Press. 734 p. 
- 29. Johnson, E. W. 1963. Ornamental shrubs for the Southern Great Plains. Farmer's Bull. 2025. Washington, DC: U.S. Department of Agriculture. 62 p. 
- 37. McNiel, Robert E.; Carpenter, Philip L. 1974. Nitrogen fixation by woody plant species as measured by the acetylene reduction assay. Hortscience. 9(4): 381-382. 
- 53. Stubbendiek, James; Conard, Elverne C. 1989. Common legumes of the Great Plains: an illustrated guide. Lincoln, NE: University of Nebraska Press. 330 p. 
- 56. Vines, Robert A. 1960. Trees, shrubs, and woody vines of the Southwest. Austin, TX: University of Texas Press. 1104 p. 
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