ALIEN FERNS IN HAWAI'I

Cyrtomium falcatum (L. f.) Presl, Holly Fern, from eastern Asia, is a popular fern in cultivation and has been known from the wild in Hawai'i since it was first collected in 1928 on the cliffs and gulches above Kalaupapa, Moloka'i (Degener 1946b). It has been found naturalized on each of the major islands, except Kauai. Hobdy (pers. comm.) informs me that it shows a marked preference for damp windward sea cliffs and is now fairly common on such sites on Maui and Molokai; elsewhere it is rare and widely scattered. Cyrtomium falcatum has escaped from cultivation in widely scattered warmer areas of the United States, New Zealand, Australia and South America.