Observed a Valeriana officinalis with a strange bulbius feature (Gall)
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That is strange isn't it! The FSC key to British plant galls lists a few galls on Valerian, but they don't seem to fit the one you have here. Perhaps some sort of virus infection? But I don't know.
Entomologist and biological recorder
Lat/Lng: 51.9, -0.5
OS grid ref: TL0829