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Rabbitbrush (Ericameria) gall - Rhopalomyia ericameriae

Rabbitbrush (Ericameria) gall - Rhopalomyia ericameriae
Mesa Verde Nat'l Park, Montezuma County, Colorado, USA
June 9, 2015

Gall not at the bud?
There are photos of this gall at the tip of the plant (as any bud gall would be), but others of the gall midway at the stem and facing out like this one. Is it the same species in both cases?

I believe so...
I assume that galls like this one are just formed on lateral buds rather than terminal buds. The only Ericameria galls listed by Gagne (1) are this species ("leafy rosette bud gall") and Prodiplosis falcata ("swollen bud").

Moved from ID Request.

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