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Native or Introduced to Illinois: introduced
Leaf: The ovate leaves are alternate and simple. The margin is serrate and the venation is palmate.
Flower: The inflorescence is a catkin with incomplete flower structure (no petals or sepals). Note: The species is only known as a staminate species and is propagated by cuttings.
Twig/Bark: Bark is easily damaged from impact; grow mostly upright and will not drop; not practically showy; should be grown as a single leader; no thorns
Size/Form/Shape: This tree has a column shape and branches that are strongly ascending and brittle. May reach 40 m or 130 ft. high.
Species is recommended for short-term wind breaks only.
County Distribution Map for Illinois:
Sources for the Sullivan Middle School Tree Identification Guide were obtained though the use of the following sites:
- Illinois Plant Information Network (ILPIN) @ http://www.fs.fed.us/ne/delaware/ilpin/ilpin.html#Background
- List of Woody Plants Native or Naturalized in Illinois @ http://www.inhs.uiuc.edu/~kenr/woody.html
- Tree Species @ http://ostermiller.org/tree/species.html
- Index to Eastern/Central Trees @ http://www.arborday.org/trees/ECtreelist.html
- ISU Forestry Extension Identification of Common Trees of Iowa @ http://www.extension.iastate.edu/Pages/tree/
- Key to Leaves of Virginia Trees @ http://www.fw.vt.edu/dendro/forsite/key/intro.htm
- List of Native Trees for Use Along Roadsides in Illinois @ http://www.inhs.uiuc.edu/~kenr/treetable.html
- The PLANTS Database @ http://plants.usda.gov/
The information below is from the National Arbor Day Foundation. This information can be viewed in the original (source) form by visiting The National Arbor Day Foundation at http://www.arborday.org.
Hardiness Zones:4 - 9
The Black Walnut can be expected to grow in the temperature extremes of the zones shown in color in this arborday.org hardiness zone map.