USA (California), Canada (Quebec), Vietnam (I), Argentina (I) as per Catalogue of Life;
Farewell to Spring or Godetia;

Clarkia amoena (farewell to spring or godetia; syn. Godetia amoena) is a flowering plant native to western North America, found in coastal hills and mountains from British Columbia south to the San Francisco Bay Area.
It is an annual plant growing to 1 m tall, with slender, linear leaves 2–7 cm long and 2–6 mm broad. The flowers are pink to pale purple, with four broad petals 1.5–6 cm long. The fruit is a dry capsule, which splits open when mature to release the numerous seeds.
Farewell to spring is commonly cultivated as a garden plant, and cultivated varieties are known.
(From Wikipedia on 27.7.13)

Flower for Id. :  Attachments (1). 10 posts by 5 authors.
This flower was shot at a garden in Awantipora ruins Srinagar, Kashmir. It’s got a rose like fragrance.
Kindly identify the flower.

portulica sps/

…, it is not portulaca sp. the flowers is double than portulaca flowers and it’s highly fragrant.

I think it is Godetia amoena

commonly known as Farewell-to-spring, now the correct botanical names is Clarkia amoena var. amoena. It a garden annual and not shrub like rose.

Clarkia amoena (Godetia) (Onagraceae).