The five 0.15€ stamps are from 2001 Letter Writing series depicting Spanish history in 16th Century.
Conquest of Mexico by Hernan Cortes,1519
Circumnavigation by Juan Sebastian Elcano,1522
Compaign against Incas by Francisco Pizarro,1532
Ascension to the throne of King Philip II,1566
Saints John of the Cross,Teresa of Jesus and painter El Greco,1580
The 0.62€ stamp is from 2009 Flora series showing Geranium which belongs to the family of the Geraniaceae and the genus Pelargonium.
Confusingly, "geranium" is also the common name of members of the genus Pelargonium. Geranium is a genus of over 400 species of flowering biennial, perennial and annual plants. These attractive flowers and their various colours make them very popular in gardening. They are grown throughout the temperate regions of the world and the mountains of the tropics, but mostly in the eastern part of the Mediterranean region. Propagation is by semi-ripe cuttings in winter and early spring or by seed. They are normally grown in part shade to full sun, in well draining but moisture retentive soils.