Plant ID forum: Native or Not? Rowan trees

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Name: June
Rosemont, Ont. (Zone 4a)
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JuneOntario
Sep 9, 2013 3:45 PM CST
I have two Rowan or Mountain Ash trees growing in an uncultivated part of my property, so I'm guessing they grew from seeds dropped by birds. One tree has orange fruits, the other has bright red fruits. How can I tell if they are native, non-native, or hybrid trees?
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Name: Lin
Florida (Zone 9b)
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plantladylin
Sep 9, 2013 3:56 PM CST
They sure are pretty trees and you might have two different types of Sorbus. I think S. americana has orange fruit and S. decora has red but I'm not certain about that. I googled and found a few Sorbus listed for Canada, one says it is introduced. Scroll all the way to the bottom of this page:

http://en.wikipedia.org/wiki/List_of_trees_of_Canada
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Name: June
Rosemont, Ont. (Zone 4a)
Lover of wildlife (Raccoon badge) Native Plants and Wildflowers Cat Lover Birds Cactus and Succulents Butterflies
Dragonflies Garden Ideas: Level 1
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JuneOntario
Sep 9, 2013 5:00 PM CST
Thanks, Lin. I will need to take a closer look at the trees' bark and buds, to see what matches up with the descriptions. I think the trees aren't likely to be Sorbus decora as I live to the south of its distribution area, but anything is possible!
Name: June
Rosemont, Ont. (Zone 4a)
Lover of wildlife (Raccoon badge) Native Plants and Wildflowers Cat Lover Birds Cactus and Succulents Butterflies
Dragonflies Garden Ideas: Level 1
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JuneOntario
Sep 12, 2013 1:10 PM CST
I've taken another, closer look at both trees. The undersides of their leaves have hairs on them, and the leaf buds are densely hairy, and so I think they are Sorbus aucuparia, the European Mountain Ash.
Name: Rick R.
near Minneapolis, MN zone 4a
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Leftwood
Sep 12, 2013 7:57 PM CST
We are lucky it is fall. The buds are an easy diagnostic for the European species.

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