Morphological characteristics of angiosperm phylogeny problem two schools on the morphological characteristics of the oldest angiosperm question their original groups and evolutionary groups have long been a center of plant taxonomists research, the focus of debate, especially for angiosperms on the "flower" sources, the biggest disagreement, the formation of two schools, the so-called "fake flowers school" and "school of real flowers," or "the catkin School" and "Buttercup school."
Parker applied to American botanist and Harrier, the British botanist Hutchinson represented real flowers doctrine that flowers are angiosperms evolved from primitive gymnosperms gender cones, thus conceived angiosperms from gymnosperms The inner cycads extinct plants, especially intended cycads (cycadeoidea), bracts cones on its evolution as a flower, microsporophylls evolved into stamens, pistils evolved megasporophyll (carpel), which cones axis is shortened to spend axis.
This theory is called the doctrine of real flowers (euanthium theory). According to this, the modern angiosperms of suspicious skin type, especially Magnoliales angiosperm plants are considered more primitive groups. |
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