Fraxius quadrangulata Michx. - Blue Ash


 

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Fraxinus quadrangulata - (image 1 of 8)

 

Taxonomy

Family: Oleaceae

Habitat

Calcareous woodland, often where limestone in near the soil surface. Also found on floodplains.

Associates

Acer saccharum, Carya cordiformis, Fraxinus americana, Fraxinus nigra, Fraxinus pennsylvanica subintegerrima, Juglans nigra, Ostrya virginiana, Quercus muhlenbergii, Quercus rubra, Tilia americana, Ulmus americana.

Distribution

From MN south to OK, east to VA, north to OH. A small part of Ontario in Canada.

Morphology

Small tree with a slightly narrow, irregular crown. Leaves opposite, pinnate compound, 5-11 leaflets, coarsely toothed, the lateral leaflets on short petiolules. Branchlets strongly 4-angled, quadrangular winged. Flowers perfect.

Notes

Flowers early April to mid May

Wetland indicator: Upland

This ash has a very limited range. The inner bark turns blue when exposed.

References

Farrar, J. L. 1995. Trees of the Northern United States and Canada.
Ames, Iowa: Iowa State University Press

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.


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 Michael Hough © 2004