Ir, “inter-region” septin rings formed along the hyphae of A. gossypii, made of discrete bars (Fig. 1); hg, “hourglass” septin rings in S. cerevisiae, appear contiguous by light microscopy; split, hg or ir rings which have undergone septation; FCF/fibers, septins organized into fibrous structures, “FCF” fibers induced by treatment with FCF; offset, angle between polarized fluorescence and ring axis, averaged over the population of rings analyzed; pop var, “population variance” in the average dipole orientation of the population of rings analyzed. For pop var and ring var, scale = 0–1; 0 = no variance; 1 = complete variance/randomness. ring var, “ring variance” denotes the average variability of dipole coherence across a single structure; each individual ring var was found using weighted averaging, “vars” were arithmetically averaged for final “ring var”. For pop var and ring var, scale = 0–1; 0 = no variance; 1 = complete variance/randomness. polRatio, “polarization ratio” denotes the average strength of order for septin structures; 1 = not ordered.