a. Flowering branch. b. Base of lamina, abaxial view, showing glands set in from margin. c. Node, showing interpetiolar stipules. d. Umbel of flower buds. e. Flower from above, calyx omitted. f. Anthers, lateral view (left) and adaxial view (right). g. Gynoecium. h. Distal portion of style. i. Cross-section of ovary. j. Old flower with bract and bracteoles. k. Maturing fruit with developing winglets. l. Mature fruit, adaxial view above, abaxial view below. Scale bar equivalents:
a, 4 cm; b, c, 4 mm; d, e, 8 mm; f, 3.3 mm; g, 4 mm; h, 0.4 mm; i, 2 mm; j, k, 8 mm; l, 2 cm. Based on: a–i, Breteler 1902 [Cameroon], P; j, Louis 8505 [D. R. Congo], NY; k, Lisowski 47916 [D. R. Congo], K; Faulkner 783 [Tanzania], K. Drawn by Karin Douthit. © University of Michigan Herbarium.