The plant seems member of Asteraceae family.

Dear Huda

Any other details of the plant. it is correct assumption that it is a species of Asteraceae. and like to be a close member of Saussuria.

With regards

Sunit Mitra

you can use 

http://www.tela-botanica.org

or other network of botanists

You may kindly check orobanchaceae family having genus Cistenchae

The depicted plant does not seems to be the member of Orobanchaceae family. So possibility of genus Cistenchae is ruled out.

Thank you for all answered my question but this plant not member in Orobanchaceae family , it belong to Asteraceae family

Surely plant is member of Asteraceae family as the capitulum inflorescence is clearly visible in the image. Please try to establish its identity from the local flora.

The plant is Asteraceae family...capitulum inflorescence clearly visible.....plz check.

this plant have the aspect of tropical plants

with an indeterminate leafy inflorescence (monopodial)

non branched peduncle 

to facilitate the identification by colleagues, more morphological and biological details are required 

- the geographic zone (altitude) , flowering period, abundance (rare or abundant)

after some days, finally i found the exact name

A silver sword (Argyroxiphium sandwicense ssp. macrocephalum)

more details available in

http://waynesword.palomar.edu/ww0903b.htm

cordially

Yes it is silversword which is a threatened plant species. Congratulations Benmeddur Tarek you are the winner.

Thank you very much Mr. BENMEDDOUR Tarek  for identification this plant

Interesting