Beschreibung:
Delevoeyas, Theodore. (Yale U., New Haven, Conn.) Investigations of North American cycadeoids: cones of Cycadeoidea. Amer. Jour. Bot. 50(1): 45–52. Illus. 1963.—A reinvestigation of the morphology of cones of Cycadeoidea indicates that they did not expand into flower‐like structures at maturity The microsporangiate region was actually a compound synangium fused peripherally and, for at least part of the time, along the inner surface surrounding the ovulate receptacle. Capping the microsporangiate region is a massive parenchymatous dome. Synangia were borne along trabecular structures which connected the outer part of the microsporangiate structure to the inner face. Pollen may have been released after an abscission of the entire compound synangium.