a. Branch with staminate flowers. b. Node with interpetiolar stipules. c. Base of lamina with glands, abaxial view. d. Buds of staminate flowers in inflorescence. e. Staminate flower from above. f. Stamens from staminate flower, adaxial view (left) and abaxial view (right). g. Pistillate flower from above. h. Pistillate flower, petals cut away, lateral view. i. Gynoecium from pistillate flower. j. Stigmas, abaxial view (left) and adaxial view (right). k. Four-winged fruit from above. l. Three-winged fruit from below. m. Three-winged fruit, lateral view. n. Cross-section of three-carpellate fruit (most of the wings cut away), showing two locules containing well-developed seeds and one with the seed abortive. o. Embryo. Scale bar equivalents:
a, 4 cm; b, 4 mm; c, 8 mm; d, e, 4 mm; f, 1.6 mm; g, h, 4 mm; i, 2.7 mm; j, 2 mm; k–m, 1.3 cm; n, 4 mm; o, 2.7 mm. Based on: a–f, Labat 2107, P; g–j, Davis 17-01, MICH; k–o, Bosser 19116, P. Drawn by Karin Douthit. © University of Michigan Herbarium.