Floral morphology of Butia soffiae. A. Rachillae bearing only staminate flowers on its upper 2/3 and triads on its lower 1/3: staminate flowers in anthesis (white arrowheads). B. Triad: a central pistillate flower flanked by two staminate flowers. C. Briefly pedicellate staminate flower (dotted white circle) and floral bracteole (white arrowhead). Sepals (grey dot). Petals (white dot). D. Sessile staminate flower (dotted white circle) and floral bracteole (white arrowhead). Sepals (grey dot). Petals (white dot). E. Petals (three white dots), stamens (six black dots), and trifid pistillode (dotted white circle). F. Shiny aspect of petal margin (black arrowhead). Petal (white dot), stereomicroscopy. G. Raphides (ra) on petal margin, LM. H. Raphides (ra) on petal margin, SEM. I. Frontal view of stamens showing the anther (an) and filament (fi). Petal (white dot). J. Lateral view of stamen showing the connective (white arrowhead). K. Detail of the striate pattern of cuticle deposition of the anther epidermis (white arrowhead) with a stoma (st), SEM. L. Upper view: shiny aspect (black arrowhead) of sepal margins. M. Raphides (ra) on petal margin, SEM. N. Pistil: stigma (st), ovary (ov), and staminodial ring (ri), stereomicroscopy. O. The dotted line shows the boundary between the ovary (ov) and staminodial ring (ri), stereomicroscopy. P. Squamiform trichomes (sq) uncovered after removing the staminodial ring. Ovary (ov), stomata (five black arrowheads), SEM. Q. Stomata (black arrowhead) and secretion (white arrowhead). R. Squamiform trichome (sq). Photographs by Bruno F. Sant’Anna-Santos.