Abstract: Porphyritic granite is the commonest textural type in the basement complex of southwestern Nigeria. The preference for this type of texture and their morphological variation is investigated and reported in this article in the light of establishing a nexus between pluton’s emplacement, regional structural trends and feldspar crystal shapes. The syn-tectonic granite which outcrops in Idanre, Ikere, Ado-Ekiti and Omu-Aran forms a unique granite chain that extends over eighty kilometres in length.