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From: Tomball, TX
Region: Southwest
Topic: Trees
Title: Distinguishing elm species from volunteers in yard
Answered by: Barbara Medford
If they are young and coming up in your yard, that is going to make identification more difficult. Some identifying characteristics may not show up until the tree is more mature. However, we'll take a stab at it. The first thing you need to do is examine the trees around you, both on your property and properties near you. If the trees are coming up volunteer, they are being seeded by trees in your area. They do not appear to put up shoots from the roots the way some oaks do. So, if you can find out what elms are growing in your area, you may be able to deduce that yours are the same. The problem there is that a great many of the characteristics do seem to be very similar: leaf arrangement-alternate, simple, serrate or doubly serrate oval leaves, leaves two to four inches long.
We found information in our Native Plant Database indicating that both the Ulmus alata (winged elm) and the Ulmus crassifolia (cedar elm) have the corky little "wings" on some of its twigs and branches. We are going to list the four types of elms you asked about, including the non-native Chinese elm, and include a link with each to a page of images of that particular species. All of these elms are presently growing in the eastern half or third of Texas, and all are apparently in Montgomery and Harris Counties, where Tomball is. All the native elms have problems with Dutch Elm disease and powdery mildew. If you are going to grow elms, you are going to need to be prepared to watch for symptoms of those diseases; the Dutch Elm disease, in particular, is usually fatal.
Ulmus alata (winged elm) Images
Ulmus crassifolia (cedar elm) Images Called a "cedar" elm because it is frequently found growing in an area with Ashe Juniper, called cedars in this part of the country.
Ulmus americana (American elm) Images
Ulmus parvifolia (Chinese Elm) Native to China, Japan and Korea Images
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