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Heteropterys alternifolia. a. Flowering branch. b. Enlargement of adaxial leaf surface. c. Base of leaf, abaxial view. d. Umbel of four flower buds. e. Flower, posterior petal uppermost. f. Posterior petal. g. Anthers, abaxial view (left) and adaxial view (right). h. Distal portion of style. i. Samara. Scale bar equivalents: a, 4 cm; b, 1.4 cm; c, d, 8 mm; e, f, 6 mm; g, 1.6 mm; h, 1 mm; i, 2.2 cm.—Based on: a–h, Eupunino 330, MICH; i, Harley et al. 17807, MICH. Drawn by Karin Douthit. First published in Contr. Univ. Michigan Herb. 19: 369. 1993; reproduced with permission of the author.
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