Thank you all of you for your useful hints. Looks like it is a Artemisia scoparia, if not, a Artemisia capillaris or a Artemisia abrotanum. I am not sure if Artemisia scoparia = Artemisia capillaris. I would like to find out what is the difference between the three of them. Any suggestion ?
All three have leaves with filiform segments. plants of A. capillaris are usually less than 1 m tall with purplish or reddish brown stems, glabrous, slender and one to few in number, segments of uppermost leaves are 0.3-0.5 mm broad, 8-12 mm long and have basal auricles. Plants of A. scoparia reach 1.3 m, much branched in lower part, yellowish to grayish seiceous-pubescent, ultimate segments 4-8 mm long, 0.2-0.3 mm broad, without auricles. A. abrotanum may grow up to 1.7 m tall, stems numerous from base, brown, glabrous or weekly hairy; leaves mostly on stem, dark green, segments filiform.