http://aggie-horticulture.tamu.edu/wildseed/plainscoreopsis.html Coreopsis tinctoria (Asteraceae) having vibrant yellow flowers with maroon centers but my plant has much darker and smaller centre. Thank to you I am closer to idetification. Krystyna
here is another photograph which shows more of the plant about 1m in ht. It is not a shrub. Most likely annual
Halimium ocymoides maybe? http://www.retamatour.com/web/02web/flora/fichas/arbolesyarbustos/Halimium ocymoides.htm HTH Chris