a. Habit. b. Proximal part of leaf, abaxial view, many hairs removed. c. Base of leaf and adjacent stem, showing minute stipule beside leaf, many hairs removed. d. Flower bud. e. Sepal with raised glands, abaxial view. f. Flower, posterior petal uppermost. g. Androecium from front with one fertile stamen flanked by two staminodes. h. Androecium from back with three connate fertile stamens flanked by two staminodes. i. Fertile anther, abaxial view. j. Staminode, abaxial view. k. Stigma from front (above) and from side (below). l. Fruit with two mericarps developed. Scale bar equivalents:
a, 4 cm; b, 1.3 mm; c, 0.8 mm; d, 8 mm; e, 2.7 mm; f, 1.3 cm; g, h, 4 mm; i, j, 2 mm; k, 1 mm; l, 4 mm. Based on: a–e, Irwin & Soderstrom 6948, NY; f–k, Heringer et al. 2168, NY; e, Goodland 224, NY. Drawn by Karin Douthit. © University of Michigan Herbarium.