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Photo#262388
Gall on coyote brush (Baccharis pilularis) - Rhopalomyia californica

Gall on coyote brush (Baccharis pilularis) - Rhopalomyia californica
Carpinteria Salt Marsh Nature Park, Carpinteria, CA, Santa Barbara County, California, USA
March 29, 2009
Size: ~1 cm
This is a gall, I believe, at the end of the stem of a coyote brush (Baccharis pilularis). I'm curious if anyone can make a guess as to what kind of insect produced the gall.

Rhopalomyia californica (midge)
I think the galls of this species are typically lumpier, not perfectly spherical, but there don't seem to be any other options for a terminal bud gall on coyote brush.

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