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Galls
Courtesy of Riku
Gall on R. glauca
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Courtesy of Cass
Rose gall on California species rose at Pt. Reyes National Seashore, north of San Francisco, California, 16 August 2007.
1 favorite vote.  
Courtesy of Cass
Gall on Rosa x dupontii in the northern eastern USA.
Courtesy of Cass
Gall on California species rose at Pt. Reyes National Seashore, north of San Francisco, California, 16 August 2007
Courtesy of Cass
Leaf galls on California species rose at Ring Mountain Reserve near Corte Madera, California, 25 August 2007.
Courtesy of Cass
A leaf gall on the Eglantine, a naturalized non-native rose, outside Petaluma, California, 1 Oct 2007, possibly caused by Rose Blister Gall Wasp, Diplolepis rosaefolii. Although this species of gall wasp has only been identified on Rosa woodsii in the Sierra Nevada, it is common in Marin and Sonoma Counties of California.
Courtesy of Cass
Leaf gall on California species rose at Ring Mountain Preserve near Corte Madera, California, 25 August 2007.
Courtesy of Cass
A stem gall on the Eglantine, a naturalized non-native rose, outside Petaluma, California, on 1 Oct 2007.
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