Floral morphology of Syagrus harenae. A. Staminate flowers on rachillae upper 1/3 and triads on its lower 2/3: staminate flowers in pre-anthesis (two black arrowheads). B. Tetrads (two white circles): staminate flowers in anthesis (two black arrowheads). C. Inflorescence bearing only pistillate flowers (after staminate flowers’ senescence). D. Triad: sessile staminate flowers, yellow pistillate flowers. E. Pedicellate staminate flowers (two black arrowheads), green pistillate flowers. F. Tetrad: two central pistillate flowers flanked by two staminate flowers. G. Pentad on lateral view: three central pistillate flowers flanked by two staminate flowers (two black arrowheads). H. Pentad: top view. Staminate flowers (two black arrowheads). I. Apex and base staminate flowers. Three petals (pe). J. Staminate flower: petals (pe) longer than the sepals (se). K. Keeled sepals (white arrowhead). Petals (pe) slightly veined (black arrowhead). L. Valvate petals (pe). M. Six stamens (six white dots). N–O. The anther is dorsifixed at the filament base (fi). Anther (an) basally sagittate. Conective (white arrowhead). P. Stamen: anther (an) and filament (fi). Q. Longitudinal dehiscence (white arrowhead) and pistillode (white circle). R. Trifid pistillode (pi). Photographs by Bruno F. Sant’Anna-Santos.