Population and individual differences in Butia odorata A, B, D–H are from Rocha, Uruguay, C is from Tapes, RS, Brazil A 20060233*E B 20060233*G C contrasting stains make the abs from the Brazil specimen more visible D enlargement of A E enlargement of B F 20060234*M G 20060237*C H 20060240*A. Note that the presence of accessory bundles (ab) surrounding the mid-rib fibrous ring (MFR) is more apparent in the Brazil sample C partially due to the staining, but less apparent or absent from the Uruguay samples. Red arrows pointing out the abs in the Uruguayan samples and abs do not completely surround the MFR in F–H. Scale bars: 0.3 mm (A, B, F–H), 0.1 mm (C), 0.2 mm (D, E).