Epithelantha micromeris ssp. polycephala

the Greek adjective “polys (πολυς)” meaning  “much, many, frequent; large; heavy” and the word “cephale (κεφαλη)” meaning "head; front; end, point; source, top; chief person”

(The specific name implies: “many-headed”)

(for example: Echinocactus polycephalus - Epithelantha polycephala )