Figs. 1–4. Inflorescences of Platanus racemosa. 1. Female inflorescence with numerous female flowers tightly clustered on spherical head. Scale bar = 0.5 cm. 2. Male inflorescence prior to anthesis. Scale bar = 0.5 cm. 3. Morphologically bisexual inflorescence with both male flowers releasing pollen and female flowers. Scale bar = 0.5 cm. 4. Higher magnification view of a female inflorescence. A single flower, consisting of nine free carpels and surrounding staminodes, is indicated by the arrow. Scale bar = 0.25 cm