Length of exposure to sunlight daily seems to make a big difference in the development of the color, because shaded plants are now still yellow to orange, while those in the bright sun are a brilliant red. Remember that sun is essential for photosynthetic production of sugar, which accumulates in the leaves in the fall to combine with a protein to make anthocyanin => red color.
With sunlight behind the leaves, they light up with dazzling intensity.
Although Staghorn Sumac doesn't seem to be good for very much, Native Americans crushed the berries to make a lemonade-type drink, and apparently you can make a fairly decent wine out of the berries, which look like this in early summer (picture from Wikipedia's entry on Staghorn Sumac). You can see where the plant gets its name, from the velvety covering of the prominent fruiting structure.
The seeds remain on the plant all winter as a food source for wildlife, although there is little nutritional value in them after the fruity flesh covering has dried up.
Now that we are well into Indian Summer here in the Twin Cities, fall color is in full swing, giving us landscapes like this one below. However, suburban landscapes are not nearly as dramatic as that up along the north shore of Lake Superior, especially this year. For some really dramatic photos of the fall color there, please click on this link to Paul Sundberg's photo gallery.
http://www.paulsundbergphotography.com/Photo-of-the-Week/Photo-of-the-week-2011/October-2-2011/19301892_3Cfskr#1507482562_dnB2bbZ
Very interesting and beautiful colors! Never knew there was such a plant! Thanks!
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