a. Flowering branch. b. Abaxial surface of lamina, with gland and hairs. c. Hair from abaxial surface of lamina. d. Stem hairs. e. Flower, posterior petal uppermost. f. Gynoecium. g. Samara, abaxial view (right) and cross-section (left). Scale bar equivalents:
a, 4 cm; b, 2 mm; c, d, 0.8 mm; e, 8 mm; f, 2 mm; g, 4 cm. Based on: a–f, Maguire et al. 36748, NY; g, Wurdack & Adderley 43579, NY. Drawn by Karin Douthit. First published in Mem. New York Bot. Gard. 32: 229. 1981; reproduced with permission of the author.