Best-fit clumping factors from the GA, with ƒ_cl for supergiants shown by blue squares, orange triangles for giants, and green circles for dwarfs. We find weighted average values of ƒ_cl = 16 ± 1 and ƒ_cl = 7 ± 1 above and below 38 kK, respectively, with an overall average ƒ_cl = 11 ± 1 . For weak-wind stars, there are little to no wind signatures in the spectrum, and so ƒ_cl cannot be reliably determined with the current method.