HandsOff:
The pink flowers ID'd as Oxalis articulata rubra (Oxalidaceae) - formerly known as Oxalis rubra.
HandsOff:
Identity given on iNaturalist as Cyclospermum leptophyllum looks right to me. Common names: "Marsh Parsley", "Slender Celery", "Fir-leaved Celery" Found on the banks of the San Lorenzo River