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[Don Yellman <dyellman@earthlink.net>]

Mark:

Certainly agree with Ed that your apple doesn't sound like a Mutsu, 
which I grow here and is a round, slighly flattened apple.  I also have 
Criterion, which is a dead ringer for Red Delicious in size and shape, 
but greenish in color unless it is left to hang very late, at which 
point it turns yellow with a pink blush.  Criterion is very crisp, but 
if near ripe I would not describe it as a tart apple, no more so than 
Red Delicious.  I use it almost exclusively to produce dried apples, a 
use for which it is admirably suited.

Miller Nurseries has carried Criterion for many years as one of their 
flagship apples, and the possibility of a mixup certainly exists.

Don Yellman, Great Falls, VA