Kinds of flowers in the Asteraceae:
Bilabiate flowers--typical bilabiate corolla
Ray flowers--imperfect (or sterile), female, strap shaped corolla with 3 lobes
Disk flowers--perfect (rarely only staminate), radially symmetrical, tubular
Ligulate flowers--irregular strap shaped corolla but with 5 lobes, perfect flowers
Filiform flowers--corolla reduced to a tube, imperfect, female
Naked flowers--no corolla, imperfect, females