Pelargonium tomentosum (USA)?

Pelargonium tomentosum Jacq., Icon. pl. rar. 3:10, t. 537. 1794 ("1786-1793"); Collectanea 5:140. 1797 ("1796"); 
 


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Balsaminaceae, Geraniaceae and Oxalidaceae Week: Geraniaceae:: Pelargonium sp.1San Francisco Botanical garden :  3 images. 
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San Francisco Botanical garden has a large number of Geraniaceae plants. This is one of them.
Most likely...
Pelargonium tomentosum
..lovely pics indeed..the last one is marvellous..cannot say about id confirmation..I think you are right..

 
 

References:

GRIN  The Plant List  plantzafrica 

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