a. Flowering branch. b. Petiole, adaxial view. c. Partial androecium laid out, abaxial view, the stamen on left opposite posterior petal. d. Fruit from above, with petals persistent, posterior petal uppermost. e. Cocci, abaxial view (left) and adaxial view (right). f. Seed. Scale bar equivalents:
a, 4 cm; b, 1.3 cm; c, 4 mm; d, 1 cm; e, 4 mm; f, 2.7 mm. Based on: a–c, Machuca 5023, MICH; d, McVaugh 14237, MICH; e, f, González T. 9, MICH. Drawn by Karin Douthit. First published in Contr. Univ. Michigan Herb. 25: 68. 2007; reproduced with permission of the author.