Dichotomous table for gallers on Chamaecyparis lawsoniana
by Hans Roskam
1a Roots with nodular swellings. Meloidogyne hapla
1b Several twigs constricted, above the infection with expanded, strong swelling of the axis, and exudation of resin. Pestalotiopsis funerea
1c Pycnidia occur on dead twigs; whether the fungus is the cause of death is probable, but not certain. Pestalotiopsis monochaetioides
1d eveloping cones are slightly discoloured and distorted. Inside, seeds are distorted and concave; in each hollow lies a pale yellow, later orange larva, which pupates in a white cocoon in early spring; a cone may contain more than 20 larvae. Cupressatia siskiyou