Intertaxon relationships
food (larval stage only)
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. - Saskatoon Serviceberry 
Amelanchier utahensis Koehne - Utah Serviceberry
Betula L. - birch
Carpinus caroliniana Walter - American Hornbeam
Crataegus douglasii Lindl. - Black Hawthorn
Crataegus flava Aiton - Yellowleaf Hawthorn
Fagus grandifolia Ehrh. - American Beech
Holodiscus discolor (Pursh) Maxim. - Oceanspray
Malus Mill. - apple
Ostrya virginiana (Mill.) K.Koch - Hophornbeam
Populus fremontii S. Watson - Fremont Cottonwood
Populus tremuloides Michx. - American Aspen
Prunus emarginata (Douglas ex Hook.) Eaton - Bitter Cherry
Prunus virginiana L. - Common Chokecherry
Quercus garryana Dougl. ex Hook. - Oregon White Oak
Quercus kelloggii Newb. - California Black Oak
Rosa gymnocarpa Nutt. - Dwarf Rose
Rubus idaeus L. - Raspberry
Salix laevigata Bebb - Red Willow
Tilia americana L. - American Basswood
Ulmus L. - elm