Christiopteris sagitta Christiopteris sagitta (H. Christ) Copel. in Perkins, Fragm. Fl. Philipp.: 188. 1905≡Polypodium sagittum H. Christ in Bull. Herb. Boiss. 6: 199. 1898Type: Loher 877=Christiopteris copelandii H. Christ in Bull. Herb. Boiss. II: 990. 1906Type: DerivedUnit#4113