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| Pictorial guide to the flora of the British Isles
| Symphytum caucasicum is a native of the Caucasus. Cothill (VC22: Berkshire); 2015-06-04 |  |  | Symphytum caucasicum differs from other blue-flowering comfreys by the greater degree of fusion between the calyx lobes. Cothill (VC22: Berkshire); 2015-06-04 |  |  All images copyright © Christopher J. Dixon unless otherwise indicated. | 
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