Abstract
In this paper the writer deals with the location of flowers on the stalk and flowering habit in buckwheat. Especially seasonal difference between summer and autumn strains regarding flowering habit is ascertained. 1. The flower of buckwheat is formed at the lower part of stem and spreads to the upper part. In comparison to several characters, the leaf which has flowers becomes slender and longer (Tab. 1) than that on other part, and the internode is also shorter. This tendency of internode is accelerated in auturnn sowings and retarded in summer(Tab. 2). The flolver cluster forms secondarily on the branch and some difference occurs in the situation of branches (Fig. 1). The generally-called flower cluster is divided here into ten or more minor flower clusters (Fig. 2). 2. The order of flowering of the flower cluster seems to behave independently from each others. This order in a stocl.c is controlled by the location of fiowers (Tab.3). A daily investigation of flowering brought a true feature of it (Tab.4). 3. 80% or more of flowers bloom from 6 to 8a. m. The flowers, do not bloom other in the afternoon or at night. But delay in flowering is caused by lower temperature (Tab. 5). 4. The flowering is quicker in summer strains than in autumn ones. Moreover the speed is lowered when sown in May, but is elevated when sown in September (Figs. 3-4). The speed can also be compared morphologically by the degree of growth in flower cluster (Tab. 6).
