New Distribution of Pteris kawabatae Sa. Kurata and Re-circumscription of Pteris arisanensis Tagawa

Pteris kawabatae Sa. Kurata was regarded as endemic to Japan. We here report its new distribution in China, Taiwan, and Vietnam. We also re-circumscribe P. arisanensis as an independent species and propose its Chinese name herein. A key is provided to compare those morphologically similar Pteris species in Taiwan, including P. arisanensis, P. biaurita, P. fauriei, P. linearis, P. kawabatae and P. wulaiensis.