Cinnamomum kanehirae Hayata is an endemic species to Taiwan. It is a large evergreen tree. Hermaphrodite flowers are produced from January to March, and drupe mature during September to October. Inflorescence primordia occur in Mid-December. Anther primordia appear by late December. Anthers are 4-celled and open by uplifting valves. The anther walls of valves are five (to six) layers consisting of an epidermis, an endothecium, two (to three) middle layers, and a tapetum. The tapetum is of amoeboid type. Tapetal cells have up to four nuclei. Microspore mother cells undergo meiosis through successive cytokinesis from mid to late January and give rise to tetrads of microspores, which are mostly isobilaterally arranged and seldom tetrahedrally or in “T” shap. Anthers are dehiscent in early February. Mature pollen grains are 2-celled in early February, and they are spheroidal and inaperturate. Carpel primordia appear in early January. Ovule primordia appear in mid- January. Ovules are anatropous, bitegmic, crassinucellate and with 2~5 cell-layered nucellar cap while embryo sac is mature. From mid to late January, the outer integument is of 3~5 layers of cells in thickness, while the inner integument is composed of 2~3 layers of cells. The micropyle is formed by inner integument. A megaspore mother cell undergoes meiosis, resulting in a linear tetrad of megaspores. The megaspore at chalazal end is functional. The development of embryo sac is of the Polygonum type. Three antipodal cells degenerate soon before fertilization. Developing endosperm is of the nucellar type. The embryogeny is of the Onagrad type. Mature seed exalbumious; cotyledons straight, auricled and massive.