Euryops tagetoides involucre

The flowerhead of Euryops tagetoides in profile displays the nearly rectangular shape of its erect-walled involucre comprising a single row of bracts, the base or receptacle slightly convex.

The thin disc of spreading ray florets is much wider. There are almost always a few of them nonconforming in the general stance, as on the first day of army boot camp. 

The heads of E. tagetoides may produce orange or yellow rays (Bond and Goldblatt, 1984; iNaturalist; http://www.worldfloraonline.org).