| DESCRIPTION |
 |
California: coastal and inland valleys, foothills, and mountains to middle
elevations. From Alaska, south to Baja California, and east, into the Rocky
Mountains. Hosts: Prevalent in oak, madrone, poplar and apple; also attacks
cherry, walnut, chestnut, willow, serviceberry, eucalyptus, pear, almond,
peach, plum, quince, alder, hop, some conifers, brambles and certain shrubs.