Abstract: Microexamination were carried out on the embryo growth of the seeds of the orchids of Cymbidium hookerianum× C. mastersii、C. mastersii × C. hookerianum、C. hookerianum × C. iridioides、C. iridioides × C. hookerianum、
C. dayanum、Arundina graminifolia、Arachnis labrosa、Eria corneri、Calanthe triplicate and Acampe multiflora. We have found there were two routes for the embryo growths, carrying through at the same time. One of the route was the embryo become green after breaking through the seed coat, the other was the embryo turned green before breaking through the seed coat. We also discovered that embryo broke through the seed coat through three ways: (1 ) the embryo becomes a bare embryo because the seed coat disappears in growth; (2) the embryo breaks through the seed coat from one aspect of the seed; (3) the embryo breaks through the seed coat from profile, then it becomes a bare embryo. The globules grew into seedlings in two ways: (1) The globules grew into seedlings through their protocorms. (2) The globules grew first into rhizome, then into seedlings.

Key words: Orchid