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Heteropterys. a–e, H. alata. a. Flowering branch. b. Cluster of flowers. c. Flower, posterior petal at upper right. d. Gynoecium, anterior style in center. e. Samara. f–k, H. complicata. f. Branch with flowers and fruits. g. Flower bud. h. Flower, posterior petal at upper right. i. Posterior petal, showing papillose adaxial surface. j, k. Fruits, each with only one mericarp developing. Scale bar equivalents: a, 4 cm; b, 8 mm; c, 5.7 mm; d, 2 mm; e, 1.3 cm; f, 4 cm; g, 4 mm; h, 5.7 mm; i, 4 mm; j, k, 5 mm. Based on: a–d, Wurdack & Monachino 39811, MICH; e, Wurdack & Monachino 39816, MICH; f–j, Breteler 4829, US; k, Cardona 822, NY. Drawn by Karin Douthit. First published in Mem. New York Bot. Gard. 32: 207. 1981; reproduced with permission of the author.
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