Abstract: During the period of March-June, 1978, the shoot growth of phyllostachys pubcsccns, Ph. praccox, Ph. nigra var. henonis, Ph. glauca and Ph. viridis were observed and measured daily. Of the first two species a young vigorous shoot for each was taken to make slides with a conventional microtomic method. Results obtained are given as follows: 1. The height growth of a bamboo shoot results mainly from the elongation of internodes which occurs neither at same time nor at same speed. The internodal elongation begins at the basal portion of the shoot where a number of elongating internodes, 14-16 for Ph. pubcscens and 10-12 for Ph. Praccox form an elongating zone and then gradually procced upward to the top in accordance with the slow-quick-slow pattern of growth. This pattern is also followed by elongating activity of individual internodes. 2. The apical meristematic zone of a bamboo shoot is pyramidal in shape and can be clearly divided into a top part (apical meristem) and a lower part (subapical meristem). The former consists of tunica-corpus and thee later is derived from meristematic tissue with differentiated sheath (leaf) primordia and procambia (provascular bundles). 3. As the shoot growth advances, some of provaseular bundles Become curved diatropically at the position of young sheath and transverse aeross the pith to initiate a new node. This newly initiated node can be recognized as the lower demarcation of the apical meristematic zone. 4. According to the literature related, an intercalary meristem is an inserted meristematic tissue in the mature tissue. As seen in bamboo shoots, it is derectly derived from the apical meristem and is separated into a number of intercalary sections by successively formed nodes. 5. The procambium further differentiates into phloem and xylem. Consequently the former develops into sieve tubes and companion cells and the later into vessels and fiber cclls. All these differentiated elements are morphologically distributed and embedded in the intercalary meristem where they divide continuously to produce the saune elements. Thus, vascular systems are not interrupted, though nodes separate the meristem into a number of intercalary zones.