Figure 3. Floral organ numbers in “Malmaison” and “St Anne's”.

(A) Longitudinal sections of flower in “Malmaison” (left) and in “St Anne's” (right). (B) Floral organs number in “Malmaison” (dark grey) and in “St Anne's” (light grey). Histograms represent the means obtained from 5 flowers from each hybrid. Error bars represent the standard deviation. The two rose varieties differ in two floral characters: organ identity reversions from petals in “Malmaison” to stamens in “St Anne's” and an overall decrease in total organ number. Chimeras: staminoid petals (see Figure S1). (C) Bivariate plot of petal and stamen number showing anti-correlation in “Malmaison” flowers, thus the lability of petal/stamen boundary in this genotype. Each square represents one flower. Correlation and determination coefficients are R = −0.84; R² = 0.71.