Plicate carpel: the transition between inner and outer primary surface has the form of a slit from the base to the top of the carpel in its ventral side and the slit is postgenitally closed.
心皮原基の内側と外側の境界は原基向軸側基部から先端までスリット状に形成され、伸長し、後天的合着をする。(e.g. some species in Annonaceae, legumes)
嚢状心皮
Ascidiate carpel: The transition between inner and outer primary surface is restricted to the top of the carpel and its wall is congenitally closed throughout.