Figure 19.

Pterogynenitens Tul., the only species of tribe PterogyneaeA cultivated tree in Brasília (Brazil) B flowering branch showing the foliage and inflorescences; note the alternate leaflets; the insets show an expanding leaf (left) highlighting the tiny caducous stipules (arrow) and a stipel at the leaflet attachment (right) C inflorescences with a visiting Syrphidae fly (Diptera) D part of the spicate raceme with some flowers removed E close-up of flowers F samaras, the inset showing the subterminal style remnant at the top of the seed chamber (arrows) G samara seed chamber opened to show the seed. Photo credits A–G RT Queiroz https://rubens-plantasdobrasil.blogspot.com/.