Calandrinia spectabilis (USA- Cultivated)?

Calandrinia spectabilis Otto & A.Dietr., Allg. Gartenzeitung 1: 161 1833. (Syn: Claytonia spectabilis (Otto & D.Dietr.) Kuntze) ?;

Cultivated garden flowers seen in San Francisco on 1/10/14.
Unfortunately, these are the only pictures I have and only these stalks were visible from where the pictures were taken.
Calandrinia sp. [Portulacaceae].
Thanks a lot for the id.
It would have been difficult for me to guess this one.
On searching, the pictures resemble Calandrina spectabilis, common name Rock Purslane.