What Core and Ammons in their handy Woody Plants in Winter call the “downy line across the top” of the leaf scar of a butternut (Juglans cinerea). The tawny suede-looking thing up there.
Mustache-like, but at the top, or outer edge of the scar.
Now, here’s the genus-mate eastern black walnut (Juglans nigra) for comparison. No mustache.
Sure, a lot of buds and leaf scars are tiny, necessitating magnification, but some are bold. The lustrous bud of American sweetgum (Liquidambar styraciflua), for instance.
This extremely fat red horse-chestnut (Aesculus x carnea), not at all sticky like standard horse-chestnut buds (Aesculus hippocastanum).
Norway maple (Acer platanoides).
This lipstick may be a magnolia.
And this is deceiving. Not buds but the work of Oak Rosette Gall Wasps (Andricus quercusfrondosus) and, of course, the oak itself.
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This work by Matthew Wills is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
Backyard and Beyond 
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