Issued in 1967 for the “Pro-Infancia” (Child Welfare) semi-postal series, this 40 céntimos stamp from Spanish Sahara features a delicate Lupinus species rendered in green and violet tones. Part of Spain’s charitable issues for its overseas territories, the stamp highlights the botanical richness of the Sahara region. Designed with the inscription CORREOS SAHARA and printed by F.N.M.T. (Fábrica Nacional de Moneda y Timbre), it remains a fine example of mid-20th-century Spanish colonial philately. Collectors value it for its floral theme and semi-postal humanitarian background.