Anthemis cotula

Images by Gurcharan Singh & Aarti S Khale (Id by Anzar A Khurro) (Inserted by J.M.Garg) (For more photos & complete details, click on the links)
Common name: Stinking Chamomile, dog-fennel, mayweed, mayweed chamomile 

Anthemis cotula, also known as stinking chamomile,[4] is a flowering annual plant with a noticeable and strong odor. The odor is often considered unpleasant, and it is from this that it gains the common epithet "stinking".
It is initially native to Europe and North Africa. It has successfully migrated to North America, Southern Africa, Australia and New Zealand[5] where it can be found growing on waste ground, alongside roads, and in fields.[6] Anthemis cotula is considered a weed due to its propensity for invading cultivated areas.[5]
The name "cotula" is from a Greek word for "small cup", describing the shape of the flowers; it was assigned by Carolus Linnaeus in his work Species Plantarum in 1753.[7]
The "stinking chamomile" Anthemis cotula is so-named for its resemblance to the true chamomile plant, Anthemis nobilis; both have branching upright stems each topped by a single large flower head, although the "stinking chamomile" is distinguished by lacking the membraneous scales underneath the flowers of the true chamomile, as well as by its characteristic strong odor. The leaves of Anthemis cotula have a similar appearance to those of the fennel plant (Foeniculum vulgare), from which the name "Dog's Fennel" is derived.[9]
Anthemis cotula is an annual glandular plant with a harsh taste and an acrid smell. Its height varies from 12 inches (28 centimeters) to 24 inches (56 centimeters).[6]
The leaves of the plant sometimes have very fine and soft hairs on the upper surface, although the plant is mostly hairless. There is no leaf stalk; leaves grow immediately from the stems. The leaves are pinnate in shape, with many extremely thin lobes, and can be around 1 or 2 inches long (2.5 to 5 centimeters).[6]
Each stem is topped by a single flower head which is usually around 1 inch (2.34 centimeters) in diameter. The flower head is encompassed by between 10 and 18 white ray florets, each with a three-toothed shape; the florets tend to curve downwards around the edges and may occasionally have pistils, although these do not produce fruit. Beneath the flower proper, oval bracts of the plant form an involucre, with soft hairs on each; further bracts are bristled and sit at right angles to the flowers.[6]
The fruits are achenes (with no pappus). They are wrinkled, ribbed with ten ridges, and have small glandular bumps across the surface. 
(from Wikipedia  on 10.5.13)

Anthemis cotula L., Sp. pl. 2:894. 1753
Common names: Dog-fennel, Mayweed
Anthemis cotula from Kashmir.
The weed was restricted to a small area near Tourist reception Centre, 35 years back but is at present the most dominant weed of the valley, extending from 1600 m to more than 3500m found almost everywhere, roadsides, wastelands, mountain slopes, pathways,etc. almost as widespread as Pathenium in warmer parts of India.

Small white flowers seen growing wild by the roadside near Anantnag on way to Pahalgam.
Id please.
This is Anthemis cotula, belonging to Asteraceae


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Invasive Alien Plants: An Ecological Appraisal for the Indian Subcontinent By J.R. Bhatt, J.S. Singh, S.P. Singh, R.S. Tripathi and R.K. Kohli