抄録
This paper gives the outline of general morphology of the wild Japanese barnyard millet (Echinochloa crus-galli) in connection with the paddy plant. 1. The roots of the wild Japnese barnyard millet seedling are thicker in diameter than those of the rice plant. This fact is useful to distinguish the two plants in younger stage. The development of the root of the full grown plant of the former is much better than that of the latter. 2. The culms of the wild Jppanese barnyard millet are thicker in diameter than those of The rice plant, and the number of nodes above the ground in the former is from 5 to 8. Contrary to the hollowness of the culm of rice plant the culm of the wild Japanese barnyard millet is solid, and sometimes put forth tillers from the nodes above the ground. 3. The wild Japanese barnyard millet coleoptyl freqently contains anthocyan. The first foliage leaf of the rice plant is imperfect, while that of the wild Japanese barnyard millet has an almost complete blade. The seond foliage leaf of the former resembles apparently to the first foliage leaf of the latter, but the careful observation upon the shape of leaf one can distinguish the two plants. The leaf of the wild Japanese barnyard millet has no auricle and ligule, and the development of midrib is more remarkable than that of the rice plant. 4. The inflorescence of the wild Japanese barnyard millet is a panicle and has from 100 to 500 spikelets. The plants can be classified by the form of panicles to some extent but they are not always constant. 5. A spikelet of the wild Japanese barnyard millet has two flowers, one of them is a fertile fiower and the other is sterile.
