ID? Two petaled flower

Spotted this beauty along the road side in SGNP. This small plant had loads of these twin petaled flower, hardly 10mm across. Though getting a clear photograph was difficult especially as the plant was under the shadow of the tree and ongoing traffic on the road brought in a lot of breeze hampering a steady frame. The resultant photograph lost sharpness and is almost shaken.

EXIF:
Canon 550D
Canon 100mm macro
F/6.3
Shutterspeed 1/125
ISO 400

Location: SGNP, Borivali

In such situations, creating a human wall - assuming there were other people with you - can help block the wind. Do you have any other view?