a. Flowering branch. b. Base of lamina, abaxial view. c. Branch enlarged to show tubercles. d. Detached large leaf, adaxial view. e. Base of lamina in d, adaxial view. f. Flower with subtending pedicel and peduncle and portion of inflorescence axis. g. Lateral petal. h. Posterior petal. i. Androecium laid out, abaxial view, the stamen at right opposite posterior petal. j. Gynoecium. k. Cocci, adaxial view (left) and lateral view (right). l. Seed. Scale bar equivalents:
a, 4 cm; b, c, 4 mm; d, 4 cm; e, 4 mm; f–h, 8 mm; i–l, 4 mm. Based on: a–c, f–j, McVaugh 16070, MICH; d, e, Ortega 6757, F; k, l, Lott 3741, MICH. Drawn by Karin Douthit. First published in Contr. Univ. Michigan Herb. 25: 22. 2007; reproduced with permission of the author.