Abstract: This paper reports the morphological characters of the spores of three species of Lunathyrium Koidz. (L. pycnosorum (Christ)) Koidz.; L. acrostichoides (Sw.) Ching; L. shandongense J. X. Li et F. Z. Li) distri-buted in Shandong province. The spores were observed by light micros-cope and scanning electron microscope. The spore morphology, especially the characters of the ornamentation, of the genus varies remarkably with species. Thus a palynological evidence for the taxonomy of the genus may be provided.