Pear virus indicator clone selected from among open-pollinated seedlings of Quince E by Posnette and Cropley. C7/1 and C7/2 were two superior virus indicator clones which behaved similarly, and C7/1 was selected for use in pear certification programs since it was less affected by mildew. Difficult to propagate by cuttings. Virus free clone from Prosser, Washington. Replacements received 9-15-1993, and again in January 1997.