Pictorial guide to the flora of the British Isles

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Geranium maderense Yeo

giant herb Robert (Geraniaceae)

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Plant Atlas 2020
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Geranium maderense is a stout perennial native to Madeira but now naturalised on cliff-tops in the Channel Islands, Cornwall and especially the Isles of Scilly (VC1: West Cornwall & Scillies).

St. Mary’s (VC1: West Cornwall & Scillies); 2026-03-22

 giant herb Robert / Geranium maderense: _Geranium maderense_ is a stout perennial native to Madeira but now naturalised on cliff-tops in the Channel Islands, Cornwall and especially the Isles of Scilly (VC1).

The flowers of Geranium maderense are more than 30 mm across, with a similar colouration to those of Malva arborea.

St. Mary’s (VC1: West Cornwall & Scillies); 2026-03-22

 giant herb Robert / Geranium maderense: The flowers of _Geranium maderense_ are more than 30 mm across, with a similar colouration to those of _Malva arborea_.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne