Monographs Details: Julocroton
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Discussion:Julocroton is closely related to Croton, differing from it mainly by the congested inflorescence in which the flowers are sessile and strongly appressed to the rhachis. A s a result, the flowers, especially the [female] ones, assume a bilateral symmetry. The ventral or adaxial side of the perianth is strongly reduced, the two lobes becoming minute scales or disappearing entirely, whereas the three dorsal or abaxial lobes develop strongly, and are in all cases pennately dissected.
The center of development of Julocroton is southern Brazil, Paraguay and Argentina, the Andes, Central America and Mexico as far north as southern Texas. From northern Brazil it extends to the Guayana Highland, but is not known in northeastern Venezuela and the West Indies. Until recently, Julocroton has not been known from Guayana.