a. Flowering branch. b. Node with interpetiolar stipules. c. Base of lamina, abaxial view. d. Detached large leaf, adaxial view. e. Flower bud with pedicel and peduncle, subtended by bract and bracteoles. f. Flower, lateral view. g. Detached petal. h. Androecium laid out, abaxial view, the stamens with longer filaments opposite sepals. i. Anther, adaxial view. j. Gynoecium. k. Distal portion of style. l. Samaras, abaxial view (left) and adaxial view (right). m. Embryos. n. Old flower after fall of samaras, showing torus subtended by lobed glandular disc. Scale bar equivalents:
a, 4 cm; b, 8 mm; c, 4 mm; d, 4 cm; e–g, 4 mm; h, 2 mm; i, 1.5 mm; j, 2 mm; k, 0.7 mm; l, 2 cm; m, 8 mm; n, 4 mm. Based on: a–c, e–k, Kaul s.n., MO; d, Singh 387, NY; l–n, Raizada s.n., NY. Drawn by Karin Douthit. © University of Michigan Herbarium.