Pelargonium tomentosum (Introduced- USA)

Balsaminaceae, Geraniaceae and Oxalidaceae Week: Geraniaceae:: Pelargonium sp.1San Francisco Botanical garden :  3 images.

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..

Yes

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References:

GRIN  The Plant List  plantzafrica  Wikipedia