Diplazium caudatum, (Cav.) Jermy

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 18

1. D. caudatum (Cav.) Jermy , Brit. Fern Gaz. 9: 161 (1964)

( Tectaria caudata Cav. ) Leaves 70-100 cm; petiole glabrous, shorter than the lamina; lamina 25-50 cm wide, ovate or ovate-lanceolate; pinnae lanceolate, acuminate or caudate; pinnules lanceolate, acute, basal pairs not markedly shorter than the upper; segments serrate-dentate, glabrous beneath. Sori oblong. Woods and shady places. Açores. Az. (Madeira, Canarias.)

D. allorgei Tardieu-Blot , Not. Syst. (Paris) 7: 150 (1938), described from San Miguel, Açores, is like 1 but the petiole is dark and hispid, and the pinnules crenate-serrate, obtuse or truncate at apex. It is possible that this plant has been introduced from South America.