a. Branch with flowers and fruit. b. Base of lamina, abaxial view. c. Flower bud subtended by one bract and two bracteoles. d. Anthers, adaxial view (above) and abaxial view (below). e. Gynoecium. f. Apex of ovary, showing rudiment of third style. g. Distal portion of style. h. Cross-section of ovary, showing two fertile locules and one with the ovule abortive. i. Fruit with all three samaras developed. j. Ventral areole of the nut of a samara. Scale bar equivalents:
a, 4 cm; b–e, 8 mm; f, 2 mm; g, 0.8 mm; h, 4 mm; i, 2 cm; j, 1.3 cm. Based on: a–c, Schmidt et al. 1727, MICH; d–h, Espírito Santo 1915, MO; i, j, Bequaert 84, MO. Drawn by Karin Douthit. © University of Michigan Herbarium.