Fruiting branch. b. Base of lamina, abaxial view. c. Samara, abaxial view (left) and lateral view looking into apical notch (right). d. Umbel of flower buds, with two buds removed. e. Flower, posterior petal at upper right, one posterior-lateral petal removed. f. Lateral petal, abaxial view. g. Posterior petal, abaxial view. h. Androecium laid out, adaxial view, the stamen fifth from right opposite posterior petal. i. Anthers, lateral view, from opposite a sepal (left) and opposite a posterior-lateral petal (right). j. Gynoecium, lateral view, anterior style to left. Scale bar equivalents:
a, 4 cm; b, 8 mm; c, 2 cm; d, e, 8 mm; f–h, 4 mm; i, 2 mm; j, 2.7 mm. Based on: a–c, Huber 4497, MICH; d–j, Huber 449, MICH. Drawn by Karin Douthit. First published in Contr. Univ. Michigan Herb. 19: 385. 1993; reproduced with permission of the author.