Horticulturist Rudolph Boysen created this hybrid berry in 1923 by crossing a raspberry, blackberry and loganberry. It's shaped like a large raspberry, has a purple-red hue and a rich sweet-tart flavor. Choose boysenberries that are firm and uniform in size. Discard shriveled or moldy berries. Do not wash until ready to use, and store (preferably in a single layer) in a moistureproof container in the refrigerator for 2 to 3 days.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.