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Native or Introduced to Illinois: introducedLeaf: Flabellate leaves have the upper margin irregularly toothed, have many veins and are divided by a deep incision which cuts them into two lobes. The leaves of the Ginkgo are green in the summer turning an attractive yellow in the fall.
Flower: The Ginkgo has almost unnoticeable flowers that bloom in the spring. Male and female flowers appear on separate trees.
Fruit: The fruit of the Gingko is ¾" to 1-½" in size and tan in color. Some complain of the mess and odor and recommend planting only the male of the species.
Bark/Twig: The bark is reddish in color.
Size/Form/Shape: This ginkgo reaches a height of 40 m (130 ft). Males are upright and irregular in shape, females are low and spreading.
A Ginkgo tree may grow very slowly for several years after planting, but then grow at a moderate rate, especially if it receives an adequate supply of water and some fertilizer. The Ginkgo is adapted for use as a street tree, even in confined soil spaces.
National Distribution Map:
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.
Sun Exposure: This ginkgo does well in Full sun to partial shade.
Soil Type: The (Maidenhair Tree) Ginkgo grows in acidic, alkaline, loamy, moist, rich, clay, sandy, silty loam, wet, well-drained, wide range of soils. This tree is drought tolerant.
Moisture: The Gingko tolerates moderate drought and moderate wetness, but does not grow well in hot and dry climates.
Growth Rate: This tree grows at a medium growth rate.
Hardiness Zones: 3 - 8
The ginkgo can be expected to grow in the zones shown in color in the arborday.org zone map.