Adults emerged on March 25 and 26, 1970 from galls collected on March 18 at Site 15.

This rosette bud gall (Fig. 29) is similar to that of R. anthoides in general structure and in plant parts affected it appears identical. However, it differs by having the inner leaves similar in length to the leaves of the outer whorls. In addition, galls on both A. t. vaseyana (Fig. 29) and A. t. wyomingensis have a proliferation of long trichomes on all leaves. In size the gall of R. florella is about the same as the smaller galls of R. anthoides.

- Robert G. Jones, Raymond J. Gagné, William F. Barr: (1983) Biology and taxonomy of the Rhopalomyia Gall Midges (Diptera: Cecidomyiidae) of Artemisia tridentata Nuttall (Compositae) in Idaho^©