In order to understand and confirm the problems of Dendrobium officinale
in China, we have observed and compared the cultivation of D. officinale for more
than 10 years, it was found that the plant morphology of D. officinale in all the
cultivation areas are significantly different; With these questions, the authors compared
the stem color, leaf width and size, the width and color of the nodes on stalk, the
length and color of the internodes respectively by pictures and tables, the differences
between the different germplasm resources were proved. The external morphological
differences of D. officinale were expounded. The identification of germplasm resources
of D. officinale was suggested in China.