Linum strictum is accepted species in  the family Linaceae  subfamily: Linoideae,  
Genus Linum 
This species is found in Afghanistan, Albania, Algeria, Baleares, Bulgaria, Canary Is., Corse, Cyprus, Djibouti, East Aegean Is., Egypt, Eritrea, Ethiopia, France, Greece, Iran, Iraq, Italy, Kriti, Krym, Lebanon-Syria, Libya, Madeira, Morocco, Pakistan, Palestine, Portugal, Sardegna, Sicilia, Spain, Sudan, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Western Sahara, Yemen, Yugoslavia.