a. Flowering branch. b. Base of leaf, abaxial view. c. Details of leaf surfaces, adaxial (above) and abaxial (below). d. Flower with lateral petals removed, the posterior petal to right. e. Portion of flower with gynoecium removed to show perigynous cup. f. Anthers, adaxial view (left) and abaxial view (right). g. Gynoecium. h. Distal portion of style. i. Samaras, side view (left) and adaxial view to show ventral areole (right). j. Old flower with torus after fall of samaras. k. Embryos. Scale bar equivalents:
a, 4 cm; b, 4 mm; c, 2 mm; d, 8 mm; e, 4 mm; f, 2.7 mm; g, 4 mm; h, 2 mm; i, 2 cm; j, 8 mm; k, 1.3 cm.—Based on Harley 16750, MICH. Drawn by Karin Douthit. First published in Brittonia 33: 282. 1981; reproduced with permission of the senior author.