Galls found on Erigeron canadense, variously situated from base of stem to tips of branches of flowering panicle; galls irregularly cylindrical, tapering at both ends, spindle-form, those on the branches more or less spherical; from 1 to 15 galls on a plant, seldom more than 10; found usually on diminutive plants, such as grow on wet, sandy places or on high, dry banks.
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The galls appear like swellings of the stem or branches, uniform in color with the plant, the surface with feint longitudinal lines, slightly elevated ridges and ragged transverse elevations, resembling leaf scaurs. The interior consists of uniform, soft, white pith, through which the larvae tunnel.

- W. Brodie: (1894) Canadian galls and their occupants. Diplosis eregeroni, n. s.^©