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Heteropterys steyermarkii. a. Flowering branch. b. Hairs, lowest from abaxial leaf surface, others from inflorescence axis. c. Flower, posterior petal uppermost. d. Half of the androecium, abaxial view, the middle stamen opposite posterior petal. e. Gynoecium, the middle style opposite anterior sepal. f. Samara and flower with torus. Scale bar equivalents: a, 3 cm; b, 0.15 mm; c, 7.4 mm; d, e, 2.3 mm; f, 1.5 cm.—Based on Steyermark 105119, MICH. Drawn  by Annette Seidenschnur Mahler. First published in Mem. New York Bot. Gard. 32: 179. 1981; reproduced with permission of the author.

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other drawings: H. actinoctenia, H. aequatorialis, H. alata, H. aliciae, H. alternifolia, H. atabapensis, H. bicolor, H. brachiata,H. caducibracteata, H. complicata, H. conformis, H. cotinifolia, H. cuatrecasasii, H. dichromocalyx, H. fruticosa, H. hatschbachii, H. krapovickasii, H. laurifolia, H. lindeniana, H. maguirei, H. marleneae, H. mathewsana, H. megaptera, H. murcapiresii, H. neblinensis, H.oblongifolia, H. obovata, H. oligantha, H. oxenderi, H. perplexa, H. prancei, H. purpurea, H. sanctorum, H. sincorensis, H. steyermarkii, H. subhelicina, H. tiinae.