Photo credit: pnwhandbooks
Blackberry (Rubus spp.)-Orange Rust : Note the bright orange aecia.
Photo by Jay W. Pscheidt, 1997.
Effect of the Orange-Rusts of Rubus on the development and distribution of stomata
by Dodge B. O. (1903)
Bureau of Plant Industry, USDA
in Journ. Agric. Res. XXV(11): 495-501
PLANT STOMATA ENCYCLOPEDIA 
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