a. Habit. b. Node with four stipules. c. Leaf. d. Base of lamina with pair of glands. e. Detail of inflorescence, showing base of pseudoraceme with overlapping bracts. f. Petal. g. Two stamens of male flower. h. Three styles arising from a rudimentary ovary embedded in a tuft of hairs (male flower). h. Samara. Scale bar equivalents:
a, 4 cm; b, 2 cm; c, 4 cm; d–f, 4 mm; g, h, 2.7 mm; i, 1.3 cm. Based on: a, e, McKee 1930, P; b, Iwaggin 5255, A; c, d, f–h, Pulsford & Floyd 5449, CANB; i, Versteegh 4720, L. Drawn by Karin Douthit. First published by C. Anderson in Blumea 56: 90. 2011.