Floral Morphogenesis of Two Annonaceae Species
番荔枝科两种植物花器官形态发生

The floral morphogenesis of Saccopetalum prolificum and Annona muricata was observed by scanning electron microscope(SEM).The perianth of the two species consisted of three alternating whorls,and the inner perianth whorls of A.muricata were variable(numbering 3,5 or 7).The floral primordium of S.prolificum was initially conic.The outer perianth whorl initiated rapidly and then the middle and inner perianth whorls initiated successively.The floral primordium became hexagonal after the inner perianth whorl fo...