
rose galls
caused by the spiny rose gall wasp on R. woodsii
narrowed down species via this paper - http://www.biology.ualberta.ca/bsc/english/grasslandsbook/Chapter12_ACG.pdf

Causes galls on rose leaves: "Spherical, 7-10 mm. in dia., covered with spines about as long as diameter of the gall, the leaf obliterated if the cluster is large."
Similar species: Wasps, Bees, Sawflies And Ants
By morpheme
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Uploaded Jun 18, 2019. Captured Jun 16, 2019 10:53 in Camas Creek Rd, Peshastin, WA 98847, USA.
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