Intertaxon relationships
species
Synaphaeta guexi (LeConte, 1852)
Alnus rhombifolia Nutt. - White Alder
Frangula californica (Eschsch.) A.Gray - California Buckthorn
Juglans californica S.Watson - Southern California Walnut
Juglans nigra L. - Black Walnut 
Juglans regia L. - Walnut
Populus trichocarpa Torr. & A. Gray ex Hook. - Western Balsam-poplar
Salix lasiandra Bentham
Salix lasiolepis Bentham - Arroyo Willow
Umbellularia californica (Hook. & Arn.) Nutt. - Californian Bay