オシロイバナの維管束の解剖学的研究

抄録

In M. Jalapa all the bundles situated internal to the conjunctive tissue are of the primary nature. They are arranged in two medullary and a peripheral vascular rings. The inner medullary ring is composed of the main leaf-trace and cauline bundles; the next one, of the intermediary leaf-trace bundles. The peripheral ring consists of the lower continuations of the bundles of the outer medullary ring. Such an organization of the vascular system as this is all the same with that of Amaranthus, and can be derived from the suppositional original plan which have been brought forward by the writer (1956a) to explain the vascular system of the amaranthaceous plants. The course of individual bundles is all the same with that ofAchyranthes japonicaas a whole.The vascular course and the ontogeny show that even the peripheral bundles are primary, as it has been shown by Maheshwari (1930) inBoerhaavia diffusa and by the writer (1956b) inAmaranthus and in Celosia.