These four elms include three native elms, plus one introduced (and uncommon) elm. These elms all flower and fruit in the spring, before leaves arrive. The fruit of elms is a flat, rounded samara, with a central seed surrounded by a thin wing. Here's how to identify American Elm, Slippery Elm, Winged Elm, and Siberian Elm from these samaras.
American Elm (Ulmus americana) |
Slippery Elm (U. rubra) |
Winged Elm (U. alata) |
Siberian Elm (U. pumila) |
|
---|---|---|---|---|
Samaras have cilia around the edges, but smooth on front and back surfaces | Samaras have NO cilia around the edges , just fuzz on front and back surfaces, in the center over the seed | Samaras have cilia around the edges AND fuzz on front and back surfaces; often reddish | Samaras have NO cilia around the edges, and also NO fuzz on the front or back surfaces | |
Samaras are elongated (longer than wide) and deeply notched | Samaras are round (about as long as wide) and not deeply notched | Samara are lanceolate (long and narrow) and have deep "claw-like" notch at the bottom, | Samara are round and have very small notch at the bottom, |
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Thanks for this! Very helpful!
Wow! What a great guide, @lisa281 . I love the format with photos. How did you get the formatting to look so good? I might want to copy the style and create something similar for sumacs.
Now if I can only retain this exquisitely distilled piece of information while out on the trail getting all distracted. Sigh....
Awesome, thank you! Very helpful!
This is great! I was able to make an ID for someone with these pictures and info. Thank you!
This is very helpful!
Very nice illustration of Elm Tree Samara! I have been trying to ID some Elm trees for the last 2 years and have spent countless hours reading Tree Books ,Googling,watching You Tube Videos.These pics were the best description to positively ID these Elm Trees! Thank You
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