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Callaeum. a–m, C. psilophyllum. a. Flowering branch. b. Node with epipetiolar stipules. c. Marginal glands on lamina, abaxial view. d. Flower bud with pedicel, peduncle, bracteoles, and bracts. e. Flower, posterior petal uppermost. f. Lateral petal, abaxial view. g. Posterior petal, abaxial view. h. Androecium laid flat, adaxial view, the three smaller stamens opposite posterior petal and adjacent sepals. i. Gynoecium, anterior style in center. j. Distal portions of a style, abaxial view (left) and adaxial view (right). k. Samaras, abaxial view (above) and adaxial view (below). l. Section of samara, dorsal winglet uppermost, seed removed from locule. m. Embryo. n–p, C. antifebrile. n. Base of lamina, abaxial view, showing inframarginal glands. o. Mericarps, abaxial view (left) and adaxial view (right). p. Section of mericarp, seed removed from locule. Scale bar equivalents: a, 4 cm; b–d, 4 mm; e, 8 mm; f, g, 5 mm; h, 4 mm; i, 2.7 mm; j, 1.3 mm; k, 2.5 cm; l, 5.7 mm; m, n, 8 mm; o, 2.5 cm; p, 2 cm. Based on: a, d–j, Hatschbach 50491, MICH; b, c, k, l, Carvalho et al. 3965, MICH; m, Zuloaga et al. 5385, MICH; n, Woytkowski 1598, MICH; o, p, Gentry et al. 21754, MICH. Drawn by Karin Douthit. © University of Michigan Herbarium.
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other drawings:

C. johnsonii

C. macropterum

C. malpighioides

C. septentrionale