"Three photographs seen from above of typical phyllotactic patterns formed by ferrofuid drops for different values of the control parameter G [11, 12]. (a) For G ≈ 1 each new drop is repelled only by the previous one and a distichous mode is obtained, φ = 180º. (b) For G ≈ 0.7 the successive drops move away from each other with a divergence angle φ = 150º (between drop three and four). Drops define an anti-clockwise spiral shown as a dashed line with parastichy numbers (1, 2). (c) For smaller G values (G ≈ 0.1) higher order Fibonacci modes are obtained. Here φ = 139º and parastichy numbers are (5, 8)."