I wanted to start this as fully parametric and control the factor too.
I can understand the mid-point can be used for Hexagonal packing but yes the factor in the way the spin around is little mystery.
You can surely replicate this with 2 spirals going on opposite direction plus some circles
Then a deformation like swirl
When trying to replicate a pattern it is good to analyse it by little parts. Draw the circles. The spirals … then search if it is attractor swirl bend taper …
Some further investigation
You can recreate quite exactly the non deformed pattern with 2 logarithmic spirals. I use my Nautilus plugin that has some spirals.
So one spiral with radius1 = 76 to 200 and angle of 66° and the other an angle of 56°.
Plus a polar array with 90 spirals arms.
