Anacyclus pyrethrum (L.) Link, Enum. hort. berol. alt. 2:344. 1822 (Syn: (=) Anacyclus depressus Ball; (≡) Anthemis pyrethrum L. (basionym));
Anacyclus pyrethrum (pellitory, Spanish chamomile, or Mount Atlas daisy) is a perennial herb much like chamomile in habitat and appearance. It is in a different family (Asteraceae) from the plants known as pellitory-of-the-wall (Parietaria officinalis) and spreading pellitory (Parietaria judaica).
It is found in North Africa, elsewhere in the Mediterranean region, in the Himalayas, in North India, and in Arabian countries.Medicinally, pellitory root has a pungent efficacy in relieving toothache and promoting a free flow of saliva and making it popular as a food spice. It induces heat, tingling and redness when applied to the skin.
Although one might assume from the pyrethrum suffix that this plant may contain pyrethrins, it does not. The pyrethrum suffix is due to being named prior to the more recent pyrethrum species which do contain pyrenthins, but are not related to Anacyclus pyrethrum. 
Ayurveda (the ancient Indian medicine system) and Siddha (the medicine system from Tamil-Nadu, a southern state in the country of India)have more uses for this plant root and it has been used for centuries as a medicine. It is called Akkal-Kara in Hindi, Akkal Kadha in Marathi, and Akkarakaaram (Tamil: அக்கரகாரம்). An oil is prepared by a method known as pit extraction (Tamil: குழி எண்ணெய்.
More recently Anacyclus pyrethrum has been noted for its anabolic activity in mice and suggests to give a testosterone-like effect, and also significantly increasing testosterone in the animal model.  
The variety depressus (sometimes considered a separate species, Anacyclus depressus), called mat daisy or Mount Atlas daisy, is grown as a spring-blooming, low-water ornamental.
(From Wikipedia on 15.5.13)
Asteraceae Fortnight Part I-Radiate Heads: Anacyclus pyrethrum from Deoban- NS 36 : Attachments (7). Attachments (7).
This is a medicinal plant shot from Herbal Garden, Deoban, near Chakrata, locally known as Akarkara… hope the id is right.. based on the display board..
Yes, I feel they have a good ornamental value too… thanks …
Good to see another Pyrethrum, actually Spanish pellitory, Akarkara in Hindi, and important medicinal plant, roots used in tooth-powders and as pungent.
I have photographs of another pyrethrum used as insecticide (Chrysanthemum cinerarii folium , now Tanacetum cinerariifolium), I will upload soon.
Fwd: Plant Identification : 2 images.
Request your help for identification of the enclosed pictures of Plant.
This picture was take at Jomsom, Mustang in Nepal which is situated at 8800 ft and lies behind the Himalayas.
Finally, I got the ID of the plant!
Anacyclus pyrethrum – Spanish Pellitory/ Longwort/ Mayweed (अकरकरा/ अकरकला)
Akarkara is a medicinal plant and used for the tooth problems.
Correction of common name :
Pellitory / Spanish Chamomile / Mount Atlas Daisy
Nepali Names : अकरकरा Akarakaraa / अकरकला Akarakalaa