a. Fruiting branch. b. Lateral short-shoot bearing young leaves and, below them, immature fruits. c. Abaxial surface of lamina to show glands (hairs concealing glands removed). d. Old flower from pistillate plant. e. Petal from old flower, flattened, abaxial view. f. Staminodes from old pistillate flower, adaxial view (left) and abaxial view (right). g. Gynoecium from old pistillate flower. h. Samara, adaxial view. i. Samara, abaxial views, with dorsal wing erect (left) and with dorsal wing bent to right (right). j. Samara in end view to show lateral and dorsal wings. k. Receptacle from above after fall of samaras, showing large fleshy disc surrounded by persistent staminodes. l. Embryo, front view (above) and side view (below). Scale bar equivalents:
a, 4 cm; b, 8 mm; c, 2.7 mm; d, 4 mm; e, 2 mm; f, 1 mm; g, 1.3 mm; h–j, 1 cm; k, 3 mm; l, 4 mm. Based on: a–g, Bosser 166, MO; h–k, Humbert & Swingle 5368, MO; l, Decary 9470, MO. Drawn by Karin Douthit. © University of Michigan Herbarium.